That's what I have averaged on my last 10 tanks of 89, mostly highway. Keep in mind that it's warm up here in New England, so about 50% of that time is with the AC on.

Not bad, eh?

 

what gas station are you using?

 

Honestly I don't even stick to one particular one. Usually it's either a Getty or a Mobil, but I haven't been intentionally gonig out of my way for one particular place. I have 90k miles, run synthetic always, have a brand new transmission and check my tires (Yoko AVS, 235/45/17) regularly, that's about it.

*knocks on wood

 

I hate you. I'm lucky if I get in the low twenties.

 

I got about 32 mpg on the highway whenever I did all highway.

 

Lead foot.

 

Congrats! what mods do you have done to your car? Mods have helped my MPG after I'm done testing them out.

I have yet to have a strictly highway trip, but I get 25+ easy in suburban driving and have gotten 29 before on a tank where I didnt floor it at all. I coast to red lights and accelerate slow most of the time.

 

I get around 31 mpg on the highway, the headers helped a little with that.

 

235 tires hurt me quite a bit..

Even with the intake/headers and a fresh tune-up I'm lucky to get 28mpg on the highway. With the stock 215s I'd expect 30+mpg pretty easily.

On the plus side, even beating on the car in the city I usually do no worse than 23mpg.

 

Feather.

 

The wife and kid have pussified my driving.

 

Best mpg I've gotten was 34.7mpg driving from Houston through Louisiana and back last October. I've gotten +30 multiple time on the highway, but usually get 19mpg driving in the city.

 

shouldn't you use at least 91? or did i read the manual wrong

 

I'm confused too, should I be using 89 instead of 91? I usually use 91 or 93 if it's available.

 

34 on a spring break trip to flordia. SRI and 93 but i average 22 around town- but i do sometimes drive like a jackaxx.

 

92 octane gets me 33.X mpg at 70-75 mph with a/c on.

 

My gas mileage doesn't change much with 89 octane. I just feel a slight loss in power. I have 235 tires and I still get over 30 on the highway expect my one trip I was loaded down with a car full of luggage, which was 28. I switch between 89 and 93 cause gas is too much!! My dad has an 02 TL-S with 160k and he runs only 89 octane and has never had any problems, well except one tranny!

 

i can feel another flame coming on...oh well ill start then, 30k car and you skimping 20 cents per gallon. ok im done.

i get about 20-21 mpg, about 85-95 percent city. running 225/40/18 at max tire pressure (44 psi) not the pressure stated on the car (29-32 psi).

 

On cruise control, I can average 28-29 MPG at 75-80 MPH on my S/C'd CLS-6 going up and down the turnpike to Central Florida. However, if I get to heavy on the boost, MPG goes way down. :

 

29 on the highway having losts of fun.

 

You're 17, I'm 31. I've put 50k+ on my car in just over a year. It's a six year old commuter car to me, not a 30k sports car. I try different things to get the best MPG, and I'm getting the best MPG with 89, not with 91.

 

I use 93 octane BTW.

 

i think on the gas cap it says premium gas only... lol i BELIEVE (not 100% positive) that the manual recommends at least 91 or higher...

 

thats what it says on mine i don't evne think they have 93 around the LA area.. maybe im wrong. who knows.

 

'Premium' (91) is displayed everywhere so the car doesn't lose performance resulting in customer complaints. If you are fully aware that the engine will retard the timing using less than 91 octane, there is nothing wrong with that. In fact it won't even make a difference at all unless the engine is under a high load (flooring, accelerating hard, hill, etc...). I even think you'll get better gas mileage with lower octane because it is less resistant to combust. But I never did a experiment to prove it. I should of when I had my Accord... I drove that thing for 245,000 miles! I'm not wasting 'expensive' gas in my Prius trying to figure it out. Plus at 600+ miles/tank it would take forever!

 

lol @ prius comment.

i would think that higher octane gas gives better MPG. guess i was wrong

well i'll stick with 91 since i like spirited driving.

we don't have a 93 in LA.... i think we have a 100 (something, not sure on exact octane) in san marino or pasadena

 

I've been using FuelEconomy.gov to track my mileage. Works nice and graphs your fuel economy over time. It'd be really cool to see more CL owners use the service as you can choose to share your mileage info so other owners can see how they compare. Right now there's only info from like 3 other users in addition to myself. Best I've gotten is 32MPG on the highway at speeds from 55-85mph (ran 85mph for a good 2 hours straight).

 

I tried joining that, but the CL isn't even on the list

 

I have been keeping track of mine, so I just added it

 

I made it from atlanta to orlando on 1 tank of gas...thats around 400-450 mi...

 

I usually get 400+ per tank with A/C 75-80 MPH all highway w/ Cruise. Around town I usually get 22-23 MPG.

 

If lower octane gas has less of a resistance to combust then wouldn't that mean it's not as efficient as high octane which would take a less amount of gas to make the same amount of combustion?

 

no its more efficient that higher octane, I believe, because it is less combustible; therefor it burns slower...

 

yawn! When any of you exceed my unofficial Acura-cl.com record of 579 miles from one tankful of gas, and consistently exceed 30mpg for each/every tankful of gas for the past 147K + miles, let me know.

 

Let me guess, you were towed for 130 of those miles? I did some quick math and that's pretty much 40 MPG. I smell

 

Documented, and repeated reported.

 

Not necessarily. If he used all 17 gallons of gas that comes out to 34mpg. Even 16 gallons of gas is 36mpg. I ran 475 miles on 14 gallons of gas which came out to 34 mpg, so it's not at all impossible.

 

Okay, so I guess if you run it to where you're on the last drop of gas and you're low gas light has been on for a hundred miles I can see how it's possible.

 

If that's the case then I've bettered that mileage wise. I've gotten 36mpg on a road trip to Indiana and back.

 

Just go the speed limit and coast as much as you can. You'll be suprised at the gas mileage you can get.