After almost 3 years with my 06, I'm still a bit disappointed with my mileage...anyone else ?

[guitarspaz]

16" or 17" wheels ? just curious...

[ClunkClunk]

16"

[VivaVibe]

Quote, originally posted by harryyiii »I am disappointed with my milage on my 05 manual Vibe. With 50-50 city highway, I am 27-28. This would not seem so bad if GM/Toyota had not gamed the EPA test to get a dishonest 30 MPG city. The difference between 27 and 30 is not that much money, but the principle annoys me.I don't believe there was any fudging at all. I consistently get 30-32 in my city commute and 36-40 with all highway driving which is better than advertised. That's with a base automatic.

[stealth]

Quote, originally posted by harryyiii » With 50-50 city highway, I am 27-28. This would not seem so bad if GM/Toyota had not gamed the EPA test to get a dishonest 30 MPG city.'07 manual here. EPA 30 city/36 hwy My last tank was 34.4 for almost 100% city driving with lots of stop signs & traffic lights and low posted speed limits.. Most of my trips are less than 5 miles which really hurst mpg. I'm trying to improve, but it's tough considering my situation. I know I'd get better mpg if I had longer trips or more hwy miles. The biggest problem I see with the EPA testing is they don't use the A/C while 98% of cars sold in the US have A/C. In Florida, we can use A/C almost all yr round!I think driving style is a big factor. The article linked below has a lot of helpful info that I'm trying to incorporate.Hope this helps.

[bhb]

I have a base 2005 (15,000 miles) with a 5 speed manual. All city driving with the AC running (honolulu) and I have been lucky to get 18 miles to the gallon. Stayed pretty much the same since new.

[coldmm803]

Quote, originally posted by harryyiii »I am disappointed with my milage on my 05 manual Vibe. With 50-50 city highway, I am 27-28. This would not seem so bad if GM/Toyota had not gamed the EPA test to get a dishonest 30 MPG city. The difference between 27 and 30 is not that much money, but the principle annoys me.there was no payoff of the EPA to obtain those #'s. under the old testing system, which put vehicles on a dyno and was done indoors where there was no wind resistance (which is still done now) but they used slow unrealiistic rates of acceleration. since then they have adjusted the testing speeds and rates of acceleration to more realistic values. iirc, the old speed for highway tests was around 60mph give or take 5mph; the new speed is 75mph. the new #'s for an 05 manual base vibe is 26 city and 33 highway.you can see the the #'s here (it won't link to the vehicle itself) http://www.fueleconomy.gov/feg/sbs.htmhere, they mention stuff that they changed http://www.fueleconomy.gov/feg/ratings2008.shtml

[Serpentine]

Excellent topic. I keep track of every fill - up. My 07 Base - Auto - on the factory 16' wheels / tires, was giving me 30 - 31 mpg, with 70/30 highway / city split.I put on new 17' Goodyear F1 tires - 225/50's - and my mileage dropped by about 3 MPG. Handling is significantly better -- but the MPG reduction is a bit of a surprise...Barry

[bull77]

just finished a road trip and got 36mpg with my base 06 635kms on 1 tank driving 115km/h on cruise.

[coldmm803]

Quote, originally posted by Serpentine »I put on new 17' Goodyear F1 tires - 225/50's - and my mileage dropped by about 3 MPG. Handling is significantly better -- but the MPG reduction is a bit of a surprise...Barryif there is an increase in weight for the wheel and tire combo, that could have an affect. also, if that size has a different outer diameter from stock then it would have some affect on the mileage reading correctly too, i dont know what the correct or normal size is for 17's