Hello,

I have a '99 XC with 60,000 on the odometer. I regularly rotate the tires to insure even wear. I follow the air pressure recommendations that Volvo has printed on the inside of the gas tank flap. Volvo recommends, to achieve the best fuel economy, to set the air pressure at 36 lbs in the front tires and 41 lbs in the rear. I've done that since I obtained this car (used) 5 years ago when it had 12,000 miles on the odometer.

I have read posts, where people have said you must keep the air pressure the same in all 4 tires, so that the circumference is identical. I do want to obtain the best mileage I can, but don't want to risk damaging the AWD. Yet, it appears, based upon my experience, I haven't destroyed the AWD. Of course, I may be lucky, and now my luck will change due to the years of having the front and rear tires set at different pressures. I would appreciate hearing other people's thoughts on whether I can safely follow Volvo's recommendations regarding economy air pressure settings, or should I stick with keeping all 4 tires at the same pressure. Thanks to all who respond.

Hugh