Go Back  AcuraZine - Acura Enthusiast Community > AcuraZine RDX Community > Third Generation RDX (2019+)
Reload this Page >

Request for those that put REGULAR gas in your RDX (gasp!)

Notices

Request for those that put REGULAR gas in your RDX (gasp!)

 
Old 01-08-2019, 09:09 AM
  #1  
Registered Member
Thread Starter
 
Join Date: Aug 2018
Age: 100
Posts: 332
Recieved 50 Likes on 37 Posts
Request for those that put REGULAR gas in your RDX (gasp!)

Hello.

This request is for those of you that put Regular gas in your 2019 RDX. You likely hide your face in shame, or maybe disguise yourself when pumping gas at the gas station but you know you skip the Premium and push that button for Regular!

I'm curious to know what kind of terrible things happen to your RDX due to this Regular gasoline. Does it knock? Ping? Is it sluggish? Reduced performance? What have YOU personally experienced from using Regular gas instead of Premium?

If this is you, could you PLEASE take a minute to shoot me a PM and let me know? I'd greatly appreciate it. You could post your reply here publicly, of course, but I understand if you'd prefer to avoid the ridicule. Thanks very much.

Oh, for the rest of you reading this post, please don't say "If you can afford a premium car you should be able to afford premium gas." It's already been said.
Sounds is offline  
The following 2 users liked this post by Sounds:
JB in AZ (01-08-2019), _korangar (01-09-2019)
Old 01-08-2019, 09:24 AM
  #2  
Registered Member
 
JAB00's Avatar
 
Join Date: Mar 2006
Location: Baltimore MD
Age: 40
Posts: 1,120
Recieved 19 Likes on 15 Posts
Originally Posted by Sounds View Post
Hello.

This request is for those of you that put Regular gas in your 2019 RDX. You likely hide your face in shame, or maybe disguise yourself when pumping gas at the gas station but you know you skip the Premium and push that button for Regular!

I'm curious to know what kind of terrible things happen to your RDX due to this Regular gasoline. Does it knock? Ping? Is it sluggish? Reduced performance? What have YOU personally experienced from using Regular gas instead of Premium?

If this is you, could you PLEASE take a minute to shoot me a PM and let me know? I'd greatly appreciate it. You could post your reply here publicly, of course, but I understand if you'd prefer to avoid the ridicule. Thanks very much.

Oh, for the rest of you reading this post, please don't say "If you can afford a premium car you should be able to afford premium gas." It's already been said.
I came from an 05 TL where premium was required. Since buying the A-Spec RDX I've been putting in regular gas. I have not noticed any discernible difference in performance.
JAB00 is offline  
Old 01-08-2019, 09:30 AM
  #3  
Registered Member
 
Join Date: Jan 2011
Location: Vancouver, BC
Age: 43
Posts: 161
Recieved 12 Likes on 12 Posts
As the Accord 2.0T makes 252hp on regular gas and is otherwise the same engine (same engine code AIUI) I would assume that running regular means the RDX motor makes 252hp instead of 272hp. The electronics are sophisticated enough that it should be easily able to handle it - Mazda does exactly this with their 2.5T, it's makes 227hp on 87 and 250hp on 93.
supafamous is offline  
Old 01-08-2019, 09:42 AM
  #4  
Registered Member
 
Madd Dog's Avatar
 
Join Date: Apr 2018
Location: Hudson Valley, NY
Posts: 1,284
Recieved 304 Likes on 231 Posts
For the first 3K miles I used regular, because the Accord is tuned for it and I expected absolutely no potential problem. At 3K I switched to premium, and I am now at 4500 miles.

The fuel economy is not measurably better, maybe .5-1mpg. The engine does feel smoother and has a bit more pep, in that I don’t go quite as deep in the throttle to get the desired acceleration. From a strictly cost-effective basis, premium does not give as much more performance as it costs. Having said that, I am sticking to premium.

I only use top tier gas.
Madd Dog is offline  
The following users liked this post:
pilozm (01-09-2019)
Old 01-08-2019, 09:44 AM
  #5  
2019 Ridgeline RTL-E
 
zroger73's Avatar
 
Join Date: Sep 2018
Posts: 324
Recieved 108 Likes on 69 Posts
The FACTS

1. The only Acura that currently requires premium gasoline is the NSX. It is recommended in all others.

2. In order to achieve the peak advertised horsepower and torque ratings, you must use premium gasoline.

3. The peak horsepower and torque ratings are achieved only at wide-open throttle.

Turbocharged Honda engines use a torque-based engine control system. This means that pressing the accelerator pedal requests a specific amount of torque from the engine. The ECU determines the best way to produce the desired amount of torque in real time using valve lift and timing, ignition timing, fuel flow, throttle blade opening, and turbocharger boost. If pressing the accelerator pedal halfway requests 150 lb-ft of torque, the engine will do what it needs to do to produce this amount of torque whether you're using regular or premium gasoline. Using regular gasoline will simply limits the maximum amount of torque the engine can produce. In short, there won't be any difference in performance in "normal" driving, but the maximum amount of torque will be reduced by a relatively small amount. Very few drivers regularly push their accelerator pedals to the floor.

Because of the adjustments the engine must make to operate on regular instead of premium, fuel economy will decrease a bit which will offset some of the savings of using regular gasoline instead of premium. Also, premium gasoline tends to contain even more detergents than what is required by law or to meet Top Tier standards which can help keep your fuel system cleaner.

The vast majority of RDX drivers won't notice a difference between regular and premium gasoline. In fact, about the only time you may notice is if you take two identical RDX's to the drag strip - one filled with regular gasoline and one filled with premium gasoline. The race will be close, but the one running premium will win.

With that said, when I spend the money for a "premium" vehicle that recommends premium gasoline, I run premium gasoline. I DO use wide-open throttle regularly and want the best possible performance under this condition.
zroger73 is offline  
The following 4 users liked this post by zroger73:
Gee-vee (01-29-2019), nist7 (01-08-2019), pilozm (01-09-2019), spinedoc777 (01-09-2019)
Old 01-08-2019, 09:46 AM
  #6  
Registered Member
 
MI-RDX's Avatar
 
Join Date: Jun 2018
Location: Michigan
Posts: 992
Recieved 237 Likes on 168 Posts
I'm pushing 5000 miles on mine. I did 1500 miles on regular, 1500 on premium and now back to regular where I'm going to stay. There's was no noticeable difference in performance or mileage so I see no point in wasting 60 cents a gallon (30% more at today's prices) for the sole purpose of making my exhaust gases more expensive to produce.
MI-RDX is offline  
Old 01-08-2019, 10:34 AM
  #7  
Registered Member
 
Join Date: May 2018
Location: Madison, WI
Posts: 861
Recieved 207 Likes on 140 Posts
In my area "regular" contains "up to" 10% ethanol (87 octane) or 15% ethanol ( 88 octane ), while "premium" often contains 0% ethanol ( 91 octane ).

Ethanol produces less energy per unit volume than gasoline but the price difference for ethanol-free gas is huge. It was $0.70 but it just went up to $0.80 per gallon in my area, $2.86 vs $2.06. Ouch!

BTW, this also goes the other way with 15% ethanol fuel; the small reduction in per-gallon cost usually doesn't make up for the decreased fuel efficiency.

Our MDXs are noticeably peppier running ethanol-free premium, and get measurably better fuel economy ( but not nearly enough to compensate for the cost difference vs regular at current prices ). They get a steady diet of premium, as does my 2019 RDX, but that may be about to change.

Technically, the ethanol-free premium gas is reserved for "collectible cars, boats, off-road vehicles, etc", but I have yet to be given any trouble about pumping it into my not-so-collectible vehicles.

Last edited by Wander; 01-08-2019 at 10:43 AM.
Wander is offline  
Old 01-08-2019, 11:37 AM
  #8  
Registered Member
 
MI-RDX's Avatar
 
Join Date: Jun 2018
Location: Michigan
Posts: 992
Recieved 237 Likes on 168 Posts
Recent study done on burning regular vs premium when premium is only recommended. Earlier studies with different vehicles (including an Acura) had the same outcome.

https://newsroom.aaa.com/2017/12/don...s-worth-price/

https://newsroom.aaa.com/wp-content/...heet-FINAL.pdf

https://newsroom.aaa.com/wp-content/...rt-FINAL-2.pdf
MI-RDX is offline  
The following 4 users liked this post by MI-RDX:
37tzee (01-08-2019), nist7 (01-08-2019), subin (01-09-2019), zroger73 (01-08-2019)
Old 01-08-2019, 12:39 PM
  #9  
Registered Member
 
Yotrek's Avatar
 
Join Date: May 2017
Posts: 310
Recieved 15 Likes on 14 Posts
Originally Posted by MI-RDX View Post
Recent study done on burning regular vs premium when premium is only recommended. Earlier studies with different vehicles (including an Acura) had the same outcome.

https://newsroom.aaa.com/2017/12/don...s-worth-price/

https://newsroom.aaa.com/wp-content/...heet-FINAL.pdf

https://newsroom.aaa.com/wp-content/...rt-FINAL-2.pdf
"no benefit in using premium gasoline in a vehicle designed to operate on regular fuel"

Yotrek is offline  
The following users liked this post:
37tzee (01-08-2019)
Old 01-08-2019, 12:40 PM
  #10  
Registered Member
 
Join Date: Mar 2017
Posts: 343
Recieved 35 Likes on 29 Posts
Originally Posted by Sounds View Post
Hello.

This request is for those of you that put Regular gas in your 2019 RDX. You likely hide your face in shame, or maybe disguise yourself when pumping gas at the gas station but you know you skip the Premium and push that button for Regular!

I'm curious to know what kind of terrible things happen to your RDX due to this Regular gasoline. Does it knock? Ping? Is it sluggish? Reduced performance? What have YOU personally experienced from using Regular gas instead of Premium?

If this is you, could you PLEASE take a minute to shoot me a PM and let me know? I'd greatly appreciate it. You could post your reply here publicly, of course, but I understand if you'd prefer to avoid the ridicule. Thanks very much.

Oh, for the rest of you reading this post, please don't say "If you can afford a premium car you should be able to afford premium gas." It's already been said.
The RDX will self destruct if you put in regular. It will realize its the same engine and transmission in a Honda that uses regular and die in shame when it realizes its been pretending to be a luxury vehicle this whole time.
skarface is offline  
Old 01-08-2019, 12:59 PM
  #11  
WTF?
 
Midnight Mystery's Avatar
 
Join Date: Mar 2016
Location: Mississippi Coast
Age: 22
Posts: 4,743
Recieved 250 Likes on 224 Posts
Regular *recommended* has made it around the entire lineup now!?!


I'll be sticking with the (A) then!
Midnight Mystery is online now  
Old 01-08-2019, 12:59 PM
  #12  
Registered Member
 
Stew4HD's Avatar
 
Join Date: Jun 2008
Location: Sugar Land, TX
Posts: 5,413
Recieved 998 Likes on 657 Posts
Originally Posted by skarface View Post
The RDX will self destruct if you put in regular. It will realize its the same engine and transmission in a Honda that uses regular and die in shame when it realizes its been pretending to be a luxury vehicle this whole time.
'cuz recommending premium fuel makes it a luxury vehicle, right?
Stew4HD is offline  
Old 01-08-2019, 01:28 PM
  #13  
Registered Member
 
Join Date: Mar 2017
Posts: 343
Recieved 35 Likes on 29 Posts
Originally Posted by Stew4HD View Post
'cuz recommending premium fuel makes it a luxury vehicle, right?
Of course, you have to use premium fuel to extract the finest grades of leather and soft touch materials or its just a regular car that uses regular fuel. Who would want that? Premium fuel is reserved for premium luxury vehicles. If I don't use premium fuel the Acura RDX is built on a throne of lies!!! loll
skarface is offline  
The following users liked this post:
Marino Moutafis (01-08-2019)
Old 01-08-2019, 01:36 PM
  #14  
Registered Member
 
Stew4HD's Avatar
 
Join Date: Jun 2008
Location: Sugar Land, TX
Posts: 5,413
Recieved 998 Likes on 657 Posts
Originally Posted by skarface View Post
Of course, you have to use premium fuel to extract the finest grades of leather and soft touch materials or its just a regular car that uses regular fuel. Who would want that? Premium fuel is reserved for premium luxury vehicles. If I don't use premium fuel the Acura RDX is built on a throne of lies!!! loll
Winter is coming, bend the knee!
Stew4HD is offline  
Old 01-08-2019, 01:44 PM
  #15  
Registered Member
Thread Starter
 
Join Date: Aug 2018
Age: 100
Posts: 332
Recieved 50 Likes on 37 Posts
Thanks to everyone for replying, I really appreciate it. I was taking notice of local gas prices and saw that the spread between Regular and Premium was close to 90 cents in some cases. That's an insane difference. Anyway, thanks again!
Sounds is offline  
Old 01-08-2019, 01:49 PM
  #16  
Registered Member
 
Join Date: Oct 2018
Location: MD
Age: 46
Posts: 169
Recieved 17 Likes on 14 Posts
Read a few articles and I am no expert or pretend to be....but a few of them stated when a vehicle states "recommended" ur better off sticking with Regular and probably the most important factor is using a quality gas product...Top Tier seems to be 1 that is often recommended. https://toptiergas.com/licensed-brands/ and I tend to goto busy gas stations as the gas should be "fresh" usually goto good old Costco!!
flames9 is offline  
Old 01-08-2019, 01:57 PM
  #17  
2006 RRP TL "The Comrade"
 
nist7's Avatar
 
Join Date: Jun 2010
Location: Honolulu
Age: 33
Posts: 3,197
Recieved 561 Likes on 385 Posts
Originally Posted by Sounds View Post
Thanks to everyone for replying, I really appreciate it. I was taking notice of local gas prices and saw that the spread between Regular and Premium was close to 90 cents in some cases. That's an insane difference. Anyway, thanks again!
It is likely not worth the extra cost in premium fuel for the amount of MPG/HP gain, as AAA already did a study and another poster factually stated that if you look at Acura owner's manual it only "recommends" and does not "require" premium. The only car that does require premium is the NSX.

The only time where it is a clear detriment to use regular all the time is if there is noticeably ping/knock...as that AAA study demonstrated in that Audi engine.

Obviously others will gladly pay the price difference to extract a bit more mpg/power out of it. Whether that price/performance discrepancy is worth it? Up to each driver to decide

A summary of actual research data:


Note those red statements are only found under "extreme" driving condition. Usual city/hwy driving saw essentially NO benefit between using premium and regular. (Unless the motor knocks on regular, in which case you should always use premium, obviously)

Last edited by nist7; 01-08-2019 at 02:00 PM.
nist7 is offline  
Old 01-08-2019, 02:05 PM
  #18  
Registered Member
 
Stew4HD's Avatar
 
Join Date: Jun 2008
Location: Sugar Land, TX
Posts: 5,413
Recieved 998 Likes on 657 Posts
Basing my usage averaging 10 gallons a week.

10 gallons a week x 52 weeks = 520 gallons
520 gallons x $0.60 savings using regular = $374.40 over that year
Stew4HD is offline  
Old 01-08-2019, 02:18 PM
  #19  
Registered Member
 
Join Date: Oct 2018
Location: MD
Age: 46
Posts: 169
Recieved 17 Likes on 14 Posts
Originally Posted by Stew4HD View Post
Basing my usage averaging 10 gallons a week.

10 gallons a week x 52 weeks = 520 gallons
520 gallons x $0.60 savings using regular = $374.40 over that year
And u will find people that say..oh its only $374.40......I would be pretty happy to find $374! lol
flames9 is offline  
Old 01-08-2019, 02:21 PM
  #20  
Registered Member
 
dopeboy1's Avatar
 
Join Date: Apr 2017
Age: 28
Posts: 694
Recieved 122 Likes on 97 Posts
This is copy and pasted from my cars owner manual; (TL with the 3.7 page 468)

"Your vehicle is designed to operate on premium unleaded gasoline with a pump octane of 91 or higher. If this octane grade is unavailable, regular unleaded gasoline with a pump octane of 87 or higher may be used temporarily. The use of regular unleaded gasoline can cause metallic knocking noises in the engine and will result in decreased engine performance. The long-term use of regular-grade gasoline can lead to engine damage"

Last edited by dopeboy1; 01-08-2019 at 02:24 PM.
dopeboy1 is offline  
Old 01-08-2019, 02:26 PM
  #21  
Registered Member
 
Stew4HD's Avatar
 
Join Date: Jun 2008
Location: Sugar Land, TX
Posts: 5,413
Recieved 998 Likes on 657 Posts
Originally Posted by dopeboy1 View Post
This is copy and pasted from my cars owner manual; (TL with the 3.7 page 468)

"Your vehicle is designed to operate on premium unleaded gasoline with a pump octane of 91 or higher. If this octane grade is unavailable, regular unleaded gasoline with a pump octane of 87 or higher may be used temporarily. The use of regular unleaded gasoline can cause metallic knocking noises in the engine and will result in decreased engine performance. The long-term use of regular-grade gasoline can lead to engine damage"
FYI, The TL basically required premium.
Stew4HD is offline  
Old 01-08-2019, 02:29 PM
  #22  
Registered Member
 
dopeboy1's Avatar
 
Join Date: Apr 2017
Age: 28
Posts: 694
Recieved 122 Likes on 97 Posts
Yeah seems like a requirement to me for the TL. Unless your okay with potential engine damage.
dopeboy1 is offline  
Old 01-08-2019, 02:43 PM
  #23  
WTF?
 
Midnight Mystery's Avatar
 
Join Date: Mar 2016
Location: Mississippi Coast
Age: 22
Posts: 4,743
Recieved 250 Likes on 224 Posts
Originally Posted by flames9 View Post
And u will find people that say..oh its only $374.40......I would be pretty happy to find $374! lol

In the RDX, I use about 30 gallons a week. This adds up quick. Premium here ranges $0.60 - $0.80 more a gallon. It used to be $0.40 more a gallon when I got the RDX nearly three years ago.
Midnight Mystery is online now  
Old 01-08-2019, 02:45 PM
  #24  
Registered Member
 
Stew4HD's Avatar
 
Join Date: Jun 2008
Location: Sugar Land, TX
Posts: 5,413
Recieved 998 Likes on 657 Posts
Originally Posted by dopeboy1 View Post
Yeah seems like a requirement to me for the TL. Unless your okay with potential engine damage.
We aren't talking about a TL here, the new RDX is only recommending premium, not requiring it like the TL (and most all past Acuras) did
Stew4HD is offline  
Old 01-08-2019, 02:46 PM
  #25  
Registered Member
 
quantum7's Avatar
 
Join Date: May 2007
Posts: 763
Recieved 191 Likes on 122 Posts
My TL (non S) says that it is designed for 91 octane and using lower may decrease performance and can cause knock. Then says that using lower than 87 octane may cause may damage. In CT regular is $2.23/gal and super (93) is about $1 more. I do about 26k miles per year, so about $1000/year regular vs Super. BTW 91 octane is almost impossible to find around me.
quantum7 is offline  
Old 01-08-2019, 02:49 PM
  #26  
Registered Member
Thread Starter
 
Join Date: Aug 2018
Age: 100
Posts: 332
Recieved 50 Likes on 37 Posts
Originally Posted by Midnight Mystery View Post
In the RDX, I use about 30 gallons a week. This adds up quick. Premium here ranges $0.60 - $0.80 more a gallon. It used to be $0.40 more a gallon when I got the RDX nearly three years ago.
And it soon could be $1 (or more) extra per gallon.
Sounds is offline  
Old 01-08-2019, 02:51 PM
  #27  
WTF?
 
Midnight Mystery's Avatar
 
Join Date: Mar 2016
Location: Mississippi Coast
Age: 22
Posts: 4,743
Recieved 250 Likes on 224 Posts
Originally Posted by Sounds View Post
And it soon could be $1 (or more) extra per gallon.

Oh. I hope not...
Midnight Mystery is online now  
Old 01-08-2019, 03:15 PM
  #28  
Registered Member
 
Join Date: Jul 2018
Location: Seattle, WA
Age: 32
Posts: 92
Recieved 36 Likes on 22 Posts
I haven't tried to put in Regular Fuel; but, to give perspective, I use Premium Fuel (Costco or Chevron) and have spent a total of $908.25 since I purchased in September 2018. Running regular would save me about 10%.

OliveBread is offline  
Old 01-08-2019, 03:25 PM
  #29  
Registered Member
 
Join Date: Jun 2018
Posts: 143
Recieved 35 Likes on 21 Posts
Costco Top Tier premium a couple of miles from my house costs about $0.45 US more than their regular at the present time, so I just go with the premium especially since it is currently $2.26 a gallon. I would not expect that price to be the case long term. Compared to the total cost of ownership of the vehicle, the difference does not seem to warrant low balling the octane even if it does not make a huge difference in performance and longevity.
gtssenior is offline  
The following users liked this post:
Marino Moutafis (01-08-2019)
Old 01-08-2019, 03:33 PM
  #30  
Registered Member
 
dopeboy1's Avatar
 
Join Date: Apr 2017
Age: 28
Posts: 694
Recieved 122 Likes on 97 Posts
Originally Posted by Stew4HD View Post
We aren't talking about a TL here, the new RDX is only recommending premium, not requiring it like the TL (and most all past Acuras) did
I know that were talking about the RDX its just people were saying only the NSX requires premium.
dopeboy1 is offline  
Old 01-08-2019, 04:00 PM
  #31  
Registered Member
 
Madd Dog's Avatar
 
Join Date: Apr 2018
Location: Hudson Valley, NY
Posts: 1,284
Recieved 304 Likes on 231 Posts
For my usage and local prices, it come to about $180/yr.
Madd Dog is offline  
Old 01-08-2019, 04:59 PM
  #32  
Registered Member
Thread Starter
 
Join Date: Aug 2018
Age: 100
Posts: 332
Recieved 50 Likes on 37 Posts
Originally Posted by OliveBread View Post
is that an app? What is it, looks pretty cool.
Sounds is offline  
The following users liked this post:
markm929 (01-09-2019)
Old 01-08-2019, 05:39 PM
  #33  
Registered Member
 
Yotrek's Avatar
 
Join Date: May 2017
Posts: 310
Recieved 15 Likes on 14 Posts
Well at the end of the day you choose which gas you comfortable with for your rdx ..whether its regular or premium..happy driving
Yotrek is offline  
The following users liked this post:
37tzee (01-09-2019)
Old 01-08-2019, 05:52 PM
  #34  
Registered Member
Thread Starter
 
Join Date: Aug 2018
Age: 100
Posts: 332
Recieved 50 Likes on 37 Posts
Originally Posted by Yotrek View Post
Well at the end of the day you choose which gas you comfortable with for your rdx ..whether its regular or premium..happy driving
Yep, absolutely true. But I wanted to hear from folks that used Regular gas in the RDX they already own, since I don't own one. At the end of the day, that's what this forum is for, right? Happy posting.
Sounds is offline  
Old 01-08-2019, 05:57 PM
  #35  
Registered Member
 
Join Date: Dec 2018
Location: Quebec, Canada
Posts: 17
Likes: 0
Recieved 5 Likes on 2 Posts

this is what it say in the manual.
BiOs2k is offline  
Old 01-08-2019, 06:07 PM
  #36  
Registered Member
 
Join Date: Jan 2019
Location: Arizona
Age: 67
Posts: 415
Recieved 78 Likes on 58 Posts
Originally Posted by BiOs2k View Post

this is what it say in the manual.
Less than 87 can lead to engine damage. Got it
JB in AZ is offline  
Old 01-08-2019, 08:56 PM
  #37  
Registered Member
 
Join Date: Jul 2018
Posts: 166
Recieved 20 Likes on 14 Posts
I've tried all grades from 87 to 94. My observations concur with those of the dog. It does seem like the accelerator has to be pressed further to get the same performance with lower octane fuel. Further, there seems to be odd surging with lower octanes, as though someone was lightly and variably applying the brake while accelerating. Stronger and smoother with 94. That said, my experience has shown -o-meter measurements are not always accurate. At some point I would like to dragstrip test the various grades to know for sure.
Burger Steak & Eggs is offline  
Old 01-08-2019, 09:02 PM
  #38  
2006 RRP TL "The Comrade"
 
nist7's Avatar
 
Join Date: Jun 2010
Location: Honolulu
Age: 33
Posts: 3,197
Recieved 561 Likes on 385 Posts
Originally Posted by BiOs2k View Post

this is what it say in the manual.
Of course it "CAN" lead to engine damage. But I highly doubt anyone uses LESS THAN 87 octane!

And as already stated, it reads that it "recommends" 91 octane.

We obviously know it can lower performance, as noted in the AAA study the performance can be either miniscule or un-observable.

The fact remains that there is no "require"-ment to use 91 vs 87.


nist7 is offline  
Old 01-08-2019, 09:13 PM
  #39  
2006 RRP TL "The Comrade"
 
nist7's Avatar
 
Join Date: Jun 2010
Location: Honolulu
Age: 33
Posts: 3,197
Recieved 561 Likes on 385 Posts
For comparison.

The following is found in the 2019 NSX Owner's Manual and it clearly states a fuel "requirement" for 91 octane, and it recommends a 93 octane:






Reading the language between the RDX and the NSX. It is clear that there is a distinction between:
  • Fuel octane "requirement" (91 octane for NSX, none for RDX)
  • Fuel octane "recommendation (93 octane for NSX and 91 octane for RDX)
  • Warning for engine damage (less than 91 octane for NSX, less than 87 octane for RDX)
nist7 is offline  
Old 01-09-2019, 08:10 AM
  #40  
Registered Member
 
37tzee's Avatar
 
Join Date: Jul 2014
Posts: 72
Recieved 12 Likes on 10 Posts
Originally Posted by Yotrek View Post
Well at the end of the day you choose which gas you comfortable with for your rdx ..whether its regular or premium..happy driving
Honestly, this discussion is not much different from the "change my oil every 3,000 mile" threads. Technology has changed; just some of our habits/prejudices haven't.

If it makes you feel better, run premium. It's not required and the benefits are minimal. It's much more important to run Top Tier gasoline.

Obviously there are owners here who the $150+ per year is irrelevant. There are also those here who will drive across town to save $0.05 per gallon too.

My Audi TT RS requires premium. My Tacoma takes regular. When we finally purchase an RDX sometime later this year - almost pulled the trigger on an MDX just before New Years - we'll run regular. What used to be a $0.10 per gallon differential has grown to way over $0.60 per gallon in my area. For me, and the mileage my wife puts on her car a year, there in no benefit to running premium.
37tzee is offline  
The following 2 users liked this post by 37tzee:
JB in AZ (01-09-2019), nist7 (01-09-2019)

Thread Tools
Search this Thread
Quick Reply: Request for those that put REGULAR gas in your RDX (gasp!)


Contact Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.