I own a 2001 Ex V6 Accord. The manual suggests tire pressure of 30 psi. My question to those in the know, will I get better gas mileage if I inflate the tires to 35 psi? If I inflate the tires more than the manual suggests, will I hurt anything on the performance of the car? By the way, I have Michelin MXV4 Energy Plus tires on the vehicle.

 

The hypermilers put their tires up to 50!!! That's not something I agree with though. I run mine @35 front & 33 rear (32&30 is called for). It may help ever so slightly with MPG but I did it more for better handling.

So put 35 in all around and check your mileage. You'll notice a slightly stiffer ride and better handling.

 

Tires are designed to operate at certain PSI, and the tire will be marked with what it should be at. I wouldn't deviate to far from this figure, RTexasF is probably at the max you should go. Too little pressure and you'll get too much drag, lowering your mileage, wearing out the tire faster, and possibly overloading the sidewalls. Too much and not enough of the tire tread will contact the road, and you'll lose traction.

 

Sorry but that is dead wrong. The marking on the tire itself is the absolute maximum. In the case of the OEM Michelins on my car that is44psi. but they all vary bymanufacturer.If you inflate to that pressure it will be a bone jarring ride. That is not to be confused with the tire pressure recommended by Honda which is 32front, 30rear (my car). I am only 3psi above recommendation.If danjel's Mich's have the same 44psi max rating he is totally safe in trying 35psi since 30 is recommended.

 

Thanks rtexas, the sticker inside my driver side door jamb states 30psi for all 4 tires. I put them all at 33psi and I like the ride. By the way, my OEM Michelin tires have a max of 44psi.

 

Always use the cold tire pressure car maker.
Stickers door jam or other.
Never use the maximum tire pressure per the tire manufacturer - unless they are the same or less.
Car maker's recommendation is optimized for ride, handling, tire wear and mpg.