Tire PSI

I am running 36 in my winter tyres 195/65/16. I usually run up to 40 in my 16" summers

Doubt covers will make any measurable difference to mpg

 

Winter snow tires 15s. 42 front 40 rear
Summer. 15s. 46 front 44 rear

Works good for me after a lot of different trying

 

Plenty of forum topics on this, but for my 15" tires I put in 36 psi front and 38 psi in the back. My over all mpg is usually 50+ but starting to go down due to colder weather and winter mix in the gas. It will probably stay in the upper 40's mpg's for about four to five months until spring time hits. No covers with mud flaps on my vehicle and window visors installed. It all boils down to how you drive it, if you want better mpg's. Hope that helps you!

 

A lot of members run their psi up to max sidewall pressure for best mpg. I personally run mine at 40F/38R. The higher psi is a little too stiff for me.

I do not remember seeing any testing that shows an actual psi versus mpg graph.

I have not noticed any mpg impact from removing wheel covers.

 

If you want the absolute highest mileage, you can't go wrong with the sidewall max (which is what I run). However, many people find the ride too harsh at that pressure. There is a comparison of different pressures coasting distances here. It looks like after 45PSI, there isn't much of a difference in rolling resistance.

 

Mainly in older bias-ply tires. Radial tires have steel belts in them that keep them in shape better. There are many people who use the sidewall max or even higher and most see even wear over the life of the tire. Just keep an eye on your tires and rotate them every 5-10k miles.

 

Yep, winter isn't kind to gas mileage. I've been averaging about 60MPG up until this tank. Its been in the 30s in the morning and I'm only getting about 51MPG on the MFD.

 

At max sidewall pressure on my 15" Intregrities I was still getting edge wear, a sign of underinflation.

 

Run 40 psi front and 38 psi rear, yes 2 pounds less in rear helps the car to track better more stable. I have done this for 8+ years in both of mine, 2005 and now 2012 and both have worn evenly across the tire, no problems at all!

 

My 15's,
44 in front, 42 rear, rotate every 2k miles.
So far no noticeable tread change.
My gain was 7

 

Wow, that's extremely frequent. I rotated every 10k miles on the OE 215/45/17 Bridgestone Turanza EL400-02. Got 65k+ out of them and perfectly even wear across all four.

 

^ Agree. The object of tire rotation is just to even out the tire set's wear, over it's lifetime. It's kind of like flipping a steak on a grill, theoretically even one flip would do.

 

Edit, it's every 5k.

New tablet still in learning mode (so is user).