i am asking someones opinion about buying myself a 1993 bmw 7 series. I have looked the car over many times it looks in perfect condition. i am driving a 1999 Chrysler Sebring convertible right now with a bunch of problems and some on the way. so i want to know any problems these cars have commonly. it does have 185,000 miles. and what grade of gasoline should be put in it because the gas price is pretty high and i don't want something that i have to put premium in. any help would be great.