As the temperature goes down, as we all know so does the tire pressure. So my tire pressure light would come on and me not really thinking much about it, I just reset it, well it started to come on all the time and from a visual look at my tires they looked fine, WRONG. I checked them with a gauge and sure enough they were about 10lbs low.
Okay I told you that story so I can tell you this story...
Before I put the proper amount of air in my tires I was getting about 260-270 miles on a tank of gas with most of that being Hwy driving. Now with the right amount of air pressure,
I got 318 on the fisrt tank and 304 on the second
without changing any of my bad driving habits.....

I know many of you guys have told people before over and over again, tire pressure will efect MPG's, But I'm living proof now and a firm believer. So if anyone is getting unsatisfactory MPG's, don't ignore that tire pressure warning light and put a gauge on your tires, they may look full but 5 or 10lbs may make the difference between 32 and 40 miles to the gallon....