Fuel Economy

[nubuilder]

I went from about 18 average to about 16.2 when I want to 20 inch wheels. Lost a bit but it sure was worth it for the looks.

Why did the size of the rims change your mileage so much?
Isn't the diameter of the tire the same?

It may be the same diameter but it is wider, which is a bigger contact patch to create more friction, but more importantly he added more weight and that weight is more crucial than say 50lbs in your bed.

I forgot that they were probably wider too.
And that rims are that much heavier than rubber.

 

[drperry]

I went from about 18 average to about 16.2 when I want to 20 inch wheels. Lost a bit but it sure was worth it for the looks.

Why did the size of the rims change your mileage so much?
Isn't the diameter of the tire the same?

It may be the same diameter but it is wider, which is a bigger contact patch to create more friction, but more importantly he added more weight and that weight is more crucial than say 50lbs in your bed.

I forgot that they were probably wider too.
And that rims are that much heavier than rubber.

Sometimes... My 30x9.5 R15 BFG A/T's are 37lbs each... My rims are in the 20 something lb range

On the engine, at least, 1 lb of rotating mass is equal to 6 lbs of stick on weight...

 

[OldCracker29]

I checked my mpg's this morning and I averaged 13.6 mpg. I kept my foot out of it about 60% of the time.

 

[fortplainman]

i dont have a DIC, but traveling nicely i usually get between 15-17. daily to work if im in a hurry or not caring about mpg i get between 10-14. winter i get 8-14 depending on idle time. i did once get 22 mpg on the highway, that was with the wind behind me and traveling at a slow 70mph.

 

[drperry]

I've been getting 16 MPG lately, since I started the new job... The shop is out of town, and the speed limit on the highway I take is 80km/h (50MPH)...

 

[nubuilder]

Filled up yesterday for $34 (13.7gal @ $2.67 for 91 oct) and got 16.8 mpg.

 

[OldCracker29]

12 mpg out of this last tank.

 

[JOEGMC]

My DIC says I'm getting 15.3...that's more than I was getting before the BB!

 

[nubuilder]

Ouch, mine was 16.7 MPG, slightly higher than normal so we'll see if it stays up.

 

[OldCracker29]

My DIC says I'm getting 15.3...that's more than I was getting before the BB!

I can't seem to keep my foot out of it.