so after 103,000 miles,
I replaced spark plugs + Injen CAI.

Just got 33MPG/HWY doing 67MPH avg A/C on for 2 hour trip.

This MPG was the best ever so far.

gotta love the CAI

 

Well done

I think I've only seen 30 once... and it was brief. As soon as I went for a pass it went back down to 29

 

it was 74degrees out

 

Nice. My car can produce similar numbers at high speed on the highway. I love it!
Getting ready to go "downy ocean, hun" on Wednesday. Will post my numbers when I get back.

 

How do you configure your display to show avg MPG/MPH numbers?

 

Keep pressing the arrow button til you get to Trip Computer. Its all in the Owners Manual, along with some other great tidbits!

 

it's amazing how our v6 can produce 30+ MPG on the HWY.
CAI definately bumps up 2-3 MPG. For past 4 years of owning TL and 100K miles, I've never seen 33MPG steady.

 

Hey Guys, I'm new here (joined today) and found this thread quite interesting! I'm feeling a little ignorant about something and was wondering if someone could explain what injen CAI is.

 

Yea I got 42 mpg going 69 mph on average. Anything is possible!

 

I amazes me how i get the same mpg in the city with my heavy hand (hand driving controls guys) and i get better mpg on the hi-way than my 08 accord coupe 4cyl. I have no mods yet and i got 35mpg going avg 61mph for 30miles. Its great living on the beach on the east coast. Roads are flat as a pancake.

 

42mpg?!?! wow thats impressive. what did you do to your car? im getting 30mpg on my base auto TL (all stock)

 

Our TL's are awesome in mpg when you compare with the performance we get out of our cars. I just filled up and my computer says 21mpg and this is mostly city and some hwy. I did write down the mileage when I had last filled up and wrote the current one subtracted the 2 numbers and divided that by the amount filled which was 13.7 and I had came out with 22mpg pretty close I would say but still good for city usage. I also have seen 31mpg when I had my cruise set at 76mph

 

Don't the 07-08's have ECO modes that automatically shut off 2-3 injectors at cruising speed which results in that awesome 42mpg above?

 

Here's one of mine at 80mph. I was averaging around 28mpg sometimes it would jump to 29 and the outside temp was 95 degree's with high heat index values here in GA

 

Wow- 42 is amazing for a TL-S! Especially at the number of miles you went. It's easy to do 40+ if you're coasting for a few miles down a hill but for 469 miles is a completely different story. I wonder how many TSX's can match that performance with their I-4?

 

Nah the 07-08's don't have it. I don't think even the new TL's have it. Now the 08+ Accord has it on their 3.5 V6 model

 

Again, intake modifications have 0 effect on mpg. It's 100% impossible. Replacing 103,000 mile plugs would have more of an effect but 3mpg is pushing the limits. You may want to get a few more tanks of fuel run through there before claiming a bump in mpg.

 

^ i doubt any acura will ever have that. as it will cut down on power, and the high end honda product (acura) would like to produce as many horses as possible to compete with other brands such as infiniti and lexus

 

this is amazing! was it a downhill trip the whole way?

 

Yeah on my last trip to Florida I averaged up to 36mpg which was better than I was getting in my 4cyl Accord. In fact over the last 4000+ miles I have averaged right at 30mpg. I have been very pleased and impressed, I love my TL!

 

@LaCostaRacer - thanks

@VQPower37 - no, it wasn't a downhill trip. This happened Memorial Day Weekend 2010.. I drove up from VA to NJ and drove around NJ and then drove back down to VA. 85 - 90% was Highway too.

 

That's impressive no doubt but you can't think that a stock weight TL is going to get 50% better mileage than every other TL out there for no reason. I've run mine at 55mph for 4 hours on end with no stops and being as light as humanly possible on the throttle and if anything the trip had a slight downhill bias and I still could not get above 37mpg. I was 15' off a semi's bumper for 70% of the trip.

 

Computer is out of whack:
461 miles in 6 hours equates to 76.8 MPH, not 69????

 

The 4 in 42 is the same as the 4 in 461. When you dim the levels of the picture in Photoshop, the "4" in 42 is brighter than the "2" and brighter than 69 in the middle row.
My bet is, the "4" covers up a "3" that was originally there.

I think it's a little Photoshop joke.



And here it is with contrast turned up a bit to accent the difference:

 

@Thuneau - Haha, Think what you must. I took the picture from My Droid about 3 months ago and posted directly onto here. I know what I drove and I had friends with me that witnessed it.

 

Something is wrong with your mid or computer. There is no way that you got 42 MPG on a Type-S when not even a base can get that (more than 10 miles). Unless you photoshopped it of course

 

Within the city, on the highway, I'm getting 21 mpg in my Type S (running the air conditioning). But driving for 6 hours at 69 mph and going 461 miles total, getting 42 mpg is great!

 

Cold Air Intake. Injen is the manf. It's basically a large aluminum tube that replaces the stock air intake assembly. You can google things from there

 

There's a fuel economy thread here that I just posted into yesterday: https://acurazine.com/forums/3g-tl-2004-2008-93/fuel-economy-787690/

My '04 is stock. Getting into the high 30s is not uncommon for me when I set cruise to 60 or 65 on my business trips. MID photos here as proof for any naysayers and I have verified many times that my MID is accurate because it always matches my hand calculations (divide # of gallons at fill-up by miles driven from previous fill-up) pretty closely. These were taken on flat terrain (Chicago to Indianapolis). I usually drive around 75mph and get around 31mpg across the tank.





Just thought I'd throw it out there as another data point.

 

How about the 6speed TL's? How are they? any better?

<~~ n00b

 

What's the best way to improve mileage? I've got an '04 with 92k and need to replace the spark plugs. Besides that, is there anything else? I have never averaged more than 23mpg, even when driving on the freeway at 60-70mph for hours

 

Exactly!

Or if he went 69mph for 6 hours the distance should have been 414 miles. HMMM... something is very wrong here.

 

i normally get a lot more going 69......oh, wait

 

This thread makes me soo happy haha. I had an '03 F150 reg cab, lowered on 22's, 5.4L V8...yeah...it got 12mpg and around 15 on the highway. So you can imagine how excited I was driving back from getting my car in Texas while getting 36mpg on the highway. Mine seems to average around 32ish on the highway and 22ish in the city. I should mention that's with AC BLASTING! because its hot as hell here in Oklahoma!!

 

Oh, speaking of A/C, that is a good point. My MIDs above were on a cool day without A/C. I think running the A/C drops my highway fuel economy by about 1-2 mpg.

 

I can vouch for yours being typical at that speed/conditions, but for about 80 miles. Took an almost identical trip 2 back to back days last week and averaged 27mpg start to finish. With very brief highway shenanigans.

 

A late night/early morning trip to Vegas following a friend's Z06 yielded 26-27mpg with cruise set at 110mph for most of the way. I was pretty happy except his Vette got about the same mileage.

 

No doubt this man put seafoam in his engine, fuel tank, sunroof, tires, and probably his pants. Congrats!


I average about 30-31 mpg on trips to Houston from Dallas. Before 111,000 miles or so, I used to get 32-33 mpg on the same trips. I'm pretty happy with the highway mileage I get.

 

I think maybe just a tad better than some autos? It really depends on how you drive, overall speed, wind, octane, etc....



This was me driving as smoothly as I possibly could on the Interstate and about a mile into the neighborhoods before I snapped the photo. My best long drive MPG was about 33 doing 70mph between KC and STL running on 93 octane. Usually my drive to STL is on 91 octane and I get about 30-31, and coming home on 93 octane usually gets me about 31-32. Speed really is the biggest factor on highway mileage.

 

EPA mileage for comparison, city/highway:
'04 MT 18/28
'05-'06 MT 18/26
'07-'08 MT 18/27
'04-'05-'06-'07-'08 3.2 AT 18/26
'07-'08-3.5 AT 17/26