My advice, You drive the best, Treat it the best, Burn primo. The car really runs better on 91.
i'll have to agree with these guys, you drive a lex and expect the best. give it the best. every now and then give it some octane booster as well
i tried that once when gas was getting expensive 3.75 in CA so I put a few gallons of 87 in my tank I was on empty, my car started to stutter on acceleration and while driving at freeway speeds i noticed a little hesitation like a miss, so i said f that and luckily i didnt have alot to burn out, and never tried that again. all i have to say is dont do it. just try to conserve gas buy driving 70 and not running the ac in the city