Wondering what you guys think. My first fillup when the Fit was new I got just a hair over 25mpg. That was my best tank in the month now that I have owned it. Now I did swap the wheels to new ones about a week in, then was getting about 23mpg. The new wheel/tire setup was probably about 3.4 lbs heavier, providing the stock Sport wheels weigh 17.5 lbs as I have seen people mention. The new wheels were 17.9 lbs, and the new tires were 21lbs. Stock wheel supposedly 17.5, stock tire is 18lbs. Now its possible my first tank was better because the car was brand new and I was really going easy on it. My 2nd wet of wheels are now 15lbs each, so with the 21lb tire, I am about .5 heavier than stock. Today I filled up and was just a hair under 25 mpg. Now keep in mind, before you all go saying that I should be getting better mpg anyway, 95% of my driving is in stop light after stop light traffic (no hwy miles for me at all), I have an AT, and I am sure it adds up, I weigh about 250 (i gotta lose weight to help my mpg lol!). Check out this pic I took a few months ago in my truck, I thought it was a cool pic, but it shows what I sit in on my 15 mile commute home every day.

 

For stop and go traffic the mpg is about rite. I get about 26-28 on locals. My car is all stock also.

 

I would say there are two that conditions apply here;

1) Lighter smaller dia wheels will yield better city MPG
2) Larger dia wheels should yield better highway MPG, weight doesn't seem to be an aspect of highway mileage for wheels. A Larger diameter will make your gear ratio's taller.

My own experience netted me 42-44mpg on a long highway road trip when I was running 205/40R17. No eco tricks, just cruise control and downshifting to 4th for the big hills.

 

I understand the diameter affecting mileage, but even with the 16" wheels I am at the stock diameter with my 205/45-16 tires.

 

wat does that side mirror pict have anything to do with mpg?

 

If you read the original post you will know.

 

[quote=Rod2Rice;334023]Wondering what you guys think. My first fillup when the Fit was new I got just a hair over 25mpg. That was my best tank in the month now that I have owned it. Now I did swap the wheels to new ones about a week in, then was getting about 23mpg. The new wheel/tire setup was probably about 3.4 lbs heavier, providing the stock Sport wheels weigh 17.5 lbs as I have seen people mention. The new wheels were 17.9 lbs, and the new tires were 21lbs. Stock wheel supposedly 17.5, stock tire is 18lbs. Now its possible my first tank was better because the car was brand new and I was really going easy on it. My 2nd wet of wheels are now 15lbs each, so with the 21lb tire, I am about .5 heavier than stock. Today I filled up and was just a hair under 25 mpg. Now keep in mind, before you all go saying that I should be getting better mpg anyway, 95% of my driving is in stop light after stop light traffic (no hwy miles for me at all), I have an AT, and I am sure it adds up, I weigh about 250 (i gotta lose weight to help my mpg lol!). Check out this pic I took a few months ago in my truck, I thought it was a cool pic, but it shows what I sit in on my 15 mile commute home every day.

Wheel weight affects mpg with acceleration or hill climbing mostly or if they 'stick out' into the aero stream so the cross section of the Fit is increased. More often than not it is wheel / tire weights that decrease the mpg.
Look at it this way, your Fit only has 90 lb-ft of torque at MOSt and if you add 5 lb more weight to each of the wheels/tires, or 20 lb-ft total or so to the load the engine must overcome to accelerate you have caused the engine to work 20% harder than it would ordinarily would and that consumes more gas.

 

honestly i think unless your wheels weight 50lbs each or stick out 5 inches past your fenders, the difference in mpg would be so small that it wouldn't be worth stressing over.

 

I'm not really stressing over it at all, was just curious to see what others thought.

 

Actually it does. Mpg is very sensitive to the cross sectional area of a vehicle which can be offset by shape but adding 1" to the tires outside the body envelope section can take away 1 mpg.

And your Fit wheels and tires come pretty close to weighing 50 lb stock; roughly 20# wheel and 22# tire. Rotating those suckers takes power. Power uses gasoline.

 

Thats cuious.

Reitterating what was said before, unsprung weight can affact it, as well as tire wear. problem with that is, you got 25 mpg on new tires as well....not really sure there. the squirm should really be about the same

 

I guess I gotta really try and baby a tankful and see what happens, and without AC which will be hard now that its gotten hot here. First tank was probably the most gentle driving just cause the car was brand new.