kurtatx

jerk offs

AKA wankers

AKA saintors

cu2wagon

I'm just here for the stimulating discussions of what and where to find data in printed documents...

losiglow

iTrader: (1)

Of course. Hydrogen and Oxygen. Two flammable gasses. The water evaporates, then explodes. I have a degree in chemistry. I know these things.

kurtatx

I have a degree in Chemical Engineering and I don't know shit

Majofo

Poor elJefe

horseshoez

iTrader: (2)

I think I'll stay back in the days of bottling vinegar and baking soda together and watching what happens.

kurtatx

I hate when they write acetic acid like that.

Also, acetic acid is another thing you can put in your engine to make it run

Majofo

What's funny is you ninnys talking about water in the tank when water injection is actually a tried and true method in use in many combustion engine applications. There was even a few enthusiasts to do it in their Acuras. Regular water of course.. premium water is for suckers.

horseshoez

iTrader: (2)

Hmmm, I've always wondered why every good NACHO Grande platter I've ever ordered had 232 chips.

kurtatx

This bottle of water will literally make your car fly

Majofo

and why every HO I've picked up cost $2

Majofo

Poor BMW drivers

snorf

LOL!!!!! I get some good chuckles out of this discussion.... but I was just wondering .....hmmmm... what does the manual say about putting plastic bags over your head?

rockyboy

I use premium (91 octane) witth no ethanol added. Not taking the chance with regular as it may lower performance or damage the engine in the long run. There's a reason 91 octane minimum is recommended and it helps the rdx to be among the fastest accelerating in its class.

thoiboi

Shit.. I may have to agree with rocky for once.. .

Majofo

What rocky meant to say is no 9/10 girl going to fuck with a peasant who uses 87 octane.
Could you imagine seeing a guy in nicely pressed Haggars purchased at Costco, pumping regular gasoline in their luxury RDX Advance Tech Platinum Plus?

chickdr

Do you have proof of this? No difference in performance noted in my 34k miles of driving with 87....

Majofo

Do you have proof of this? How about you remove your catalytic converters and compare them to ones used with 93 octane.
You can then remove the heads and pistons, show us the valve and head surface, piston surface, and ringlands.
At least monitor timing and show us the log of timing, rpm, knock sensor output, that shows that timing isn't pulled over load due to knock.
Go ahead, we'll wait. #casualtuesday

Majofo

There are several threads that prove that knock occurs and timing pulled even on 93 octane.

chickdr

Ok - then riddle me this. How is it the identical motor with the same output and compression ratio is used in the Accord V6 and requires 87? I am waiting for an answer other than "the manual recommends 91 or better"....

Majofo

Because Marketing

Majofo

Telling customers that the car can use regular vs telling them it needs premium sells..
Marketing asks the chief engineer.. will the car perform on regular.. technically it can.
You're not going to notice but a minor dip in fuel efficiency and a some unmissed hp.
But the consequence of that lost efficiency is unburnt fuel getting thrown down the pipe.

There's no magical sensor to tell the car to pull timing because there's regular in the tank.
Knock occurs and timing is pulled. Knock is bad. Will your car survive? of course..
But if you expect to drive your car into the ground, that will be sooner than later.
Some of us hold onto our cars for the long haul.

chickdr

If what you were postulating was true we would be hearing about issues by now. The 3.5 V6 has been used for many years and many cars have well over 100k. We would have a lot of actual evidence of problems if it were happening. I have yet to see one thread on V6 engine issues caused by 87 octane gas.

rockyboy

It's the way gasoline works, basically a series of controlled explosions. The higher octane gasoline is good for the catalytic converter and yields longer burn duration. You get optimal performance and torque. Using a lower grade fuel will lower the performance and cause knocking which can damage the engine over time. Premium fuel is also more likely to contain no ethanol

rockyboy

In a practical sense, if I were to race you in my RDX (which has been fueld with only 91 octane to 93 octane) vs yours (87 octane?), mine would win the race.

horseshoez

iTrader: (2)

Your above quote only holds true for higher compression engines designed for premium fuel; running fuel which is a higher octane than the engine was designed for will have zero beneficial result.

Depends upon where you live; here in New England, virtually all fuel contains ethanol, regardless of the AKI.

Majofo

You assume the community here consists of all Acura / Honda owners.
This community is mostly enthusiast who use premium religiously.
You also assume the community here are into keeping cars past 100k.
Most do not.

But there are several threads about failed catalytic converters, knocking, pinging..
a few with pics of knock damage on their pistons, burned valves, lost ring seal, etc.
One or two rods thrown out the bottom of the engine.
You can find the same thing from board to board.
Were they all caused by 87 / bad gas.. that's tough to prove.

But it's been proven that timing, octane, and load are all associated.
Just basic thermo proves that an object under a higher temp curve will fail sooner.
The fact is.. if the engine is pulling timing even on 93.. running 87 isn't a great idea.
Everything runs hotter, so more fuel is thrown down to try to keep things in check.
If you're leasing or going to dump your vehicle on some chump when warranty goes out, go for it.

losiglow

iTrader: (1)

I've got to say, it's certainly a bit weird that the requirement for the J35Z2 engine in the Accord is regular while it's premium in the RDX. Maybe it's because engine is pushed harder in the RDX since it's a larger vehicle. Looks to be about 400lbs. or so heavier than the Accord. I'm sure it also had to do with marketing. Nearly every luxury brand, even an entry level luxury brand like Acura, recommends premium in their vehicles. I dunno though. It's pretty well established that knocking will occur with the TL 3.5 with the J35Z6. That one has a 11.2:1 compression ratio. The J35Z2 has a 10.5:1. That's not all that much different. I think if I had either an Accord or RDX I'd probably use premium. But I think I probably push my cars a bit harder than the average driver.

chickdr

I don't think we are ever going to have this happen so kind of a mute point, but how many drag races do you engage in per week? I notice no difference in the RDX's performance when using premium.

Again, lots of speculation here. I use 87 as there is no logical reason not to with the Accord V6 recommendations. Could you point me to any threads, here or anywhere, on the 2013-18 RDX, or 9th gen Accord V6 with engine failures due to use of 87 octane gas? The thing is, some folks here act as if the RDX has a high performance motor. We are talking about a 3.5L V6 with 279 hp, or <80hp/L, so it's hardly a stressed motor. There are many 3.5 and 3.6 V6's putting out a lot more hp (heck even the RLX with its 310hp out of the 3.5 would have more justification). My 2006 S2000 with a 2.2L 4 banger put out 237hp. That one needed premium....

It is similar to my '11 Tacoma with a 2,7 L 4 banger. Toyota specs it for 5k oil change intervals. The same truck with the 4.0 V6 has a 10k interval. Both use the same 0w20 full synthetic oil. Again, makes no sense to me. I do 10k intervals on mine with a filter change at 5k. No issues in 60k miles and it burns no oil at all.

As an aside - I am not leasing my RDX either. Plan to drive it for 5-6 years if it holds up.

Majofo

You're either zero or 100.. #logicdoesntapply
#byefelicia

losiglow

iTrader: (1)

No more than pointing to any threads that show that red meat causes colon cancer or BPA from plastic bottles causes infertility. Well, I think octane ratings are probably more well established than those. Still, the point is the same. If there's a well established chance, even without definitive proof, I'd say err on the side of caution. However, it's different for each individual. If I drop something on the floor I'll still eat it. And I drink/eat food with artificial sweeteners. I might get sick from germs that get on the food or get cancer from artificial sweeteners but it's a risk I'm willing to take. If you're willing to take the risk, even if it's minor or perceived, from using regular fuel, go right ahead. You're right. It might have absolutely no effect. But maybe it will.....

NBP04TL4ME

- Don't you just love gas threads????

losiglow

iTrader: (1)

Oh yeah. About as fun as discussing Ford vs. Chevy or PC vs. Mac.

Majofo

Ford and Apple can get fucked!

Majofo

j/k.. just Apple.

chickdr

And this is my quandary. If all Honda/Acura cars using the 3.5 V6 required premium, I would have no issues. Heck even if the RDX's motor was tuned differently. But alas, it isn't.

losiglow

iTrader: (1)

True. I wonder if there are differences between the RDX and Accord that might contribute. Specifically regarding heat. Does the RDX have a transmission fluid cooler vs. the Accord? That would increase the load on the cooling system potentially making the RDX engine run a bit hotter. Is the cooling system any different between the two? Possibly more efficient in the Accord for various reasons? The condenser for the AC may also play into it. The condenser on my TL is huge. It's the same size as the radiator which probably explains why the AC works so awesome in the TL. . The condenser in my old accord was about half the size of the radiator, which isn't uncommon in many cars. I can't speak to the 8th gen Accord however. A larger condenser would increase AC efficiency but also increase heat load on the car. More heat = more prone to knock. Also, like I mentioned, the RDX is heavier. The likelihood of engine load being higher with the RDX is a likely component. Higher engine load also increases the likelihood of knock.

I'm just postulating really. I could do the research to get info on those items but I'm not really motivated I'd like to think it's more than marketing that caused the engineers to indicate premium for the RDX.

Majofo

mute vs moot
liters / hp vs octane
liters / OCI vs oil
Not understanding even the basics of a FI combustion engine

Yay octane threads..

horseshoez

iTrader: (2)

One thing to keep in mind vis-à-vis the A/C condenser/engine temperature relationship is the efficiency of the radiator. If the radiator is large/efficient enough to hold engine temperature constant at the thermostat's rated temperature for the conditions you drive in, then the condenser will have no effect on detonation or any other engine lifespan limiting conditions.

Said another way, if the thermostat in your car is set to 190°F, the odds of the heat from the A/C condenser causing the coolant temperature to exceed that is pretty remote.

horseshoez

iTrader: (2)

I think I've had the moot button pressed on this thread.