How much of an increase in mpg can I expect with overinflated tires?

[skewbe]

Originally Posted by bowtieguy

brilliant skewbe! just inflated mine to 60psi(from 44) and i'm gonna try that. thank you.

Originally Posted by trebuchet03

ha, that would totally work too.

I should qualify this a bit. If you have been driving around with "underinflated" tires, the outsides WILL have worn down and pumping them up can give the impression that there is a bulge in the middle.

I think the chalk test followed by rolling forward a couple tire revolutions would be better than paint for identifying "bulge". The paint might be better for monitoring the effect of alignment changes in "the real world" (i.e. cornering/accelerating/braking).

Originally Posted by trebuchet03

...Actually, that's one method to check gear lash on really really big gears -- spray on some paint and then run the machine for awhile... Then check how the gears are meshing.

Ah yes, reminds me of a little tube of prussian blue I've had for years.