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Non-Sexy MPG Advice

6307 Views 66 Replies 23 Participants Last post by  crowz
This is about as sexy as John Goodman in a speedo but it definitely works, particularly for heavy pickups.

Keep your tires aired up rock-hard.

This is a must for folks with firebomb tires but it makes a big difference on other brands as well.

I use 235-85 E rated tires and I keep them inflated to 80 psi, front and rear. Any more and the tire starts to "crown" - bulge out in the middle of the tread. That will wear the center of the tire out quickly. Not recommended.

My truck is very sensitive to this. If the tires get down to 70 psi, I lose 1 MPG. At 60 psi, 3 MPG. Ask me how I know that. Don't gundeck the tire inflation.
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Yes, load will affect tire wear based on inflation pressure. Unloaded the rear tires need less air pressure because the tire is supporting less load. What is on the sidewall is for rated load/pressure. In some cases I'll over-inflate tires to keep temps and tread wear good.

The BFG A/T's I've got on my toy hauling truck are D tires and are 50 or 55psi on the side wall. To keep the tire temperature safe I have to run the rears at 65-70psi and I run the fronts around 60-65psi. This give the best tread life as well. If I run less pressure the tire gets far too hot and the tread wears on the outsides.
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