Anyone have Michelin Defender tires? What's your PSI (Air pressure)??

I would look at the side wall of the tire and set the pressure about two pounds less than the max pressure listed for the front and 4 pounds less for the rear. Your mileage will go up a few 2-3 mpg, maybe a little more. Just what I would do others will chime in! Enopy your car.

 

Yea! I run 44 front and 42 rear.

 

You just got new tires. That will nearly always bring your mpg down even if you bought the same tire you were replacing.

Air them up to 44/42psi and break them in. Your mpg should come back up to within 2mpg of your old tires.

Tire Tech Information - Tire Rolling Resistance Part 3: Changes to Expect When Switching from Worn-Out to New Tires

 

I keep all 4 of my tires, Michelin Energy Saver AS (195.65.15) at 44 max sidewall pressure. My first
set of Energy Saver lasted nearly 70,000 miles at that pressure with perfect even tire wear....

 

42 front 40and rear here

 

While Defenders are indicated as LRR on TireRack, and Michelin bills them "Green X", I don't think they're in the same league as other LRR tires, just judging from comment on the web.

While there's some truth to tire RR improving with time, I doubt it's gonna change much. A good LRR tire will deliver impressive results from the outset. This "give it time" notion has got to be due in part to tire places trying to placate customers.

What will improve your mileage is the tire will force you to try even harder to recoup the difference. In your shoes, I'd just stick at it, up your pressures, and maybe replace them when they're down to about 6/32" remaining.

One plus: I believe their longevity is good, which will mean you're stuck with them for a while.