The 1990 Cadillac Deville is one of the best American cars in history! I just got this car from my grandparents with a little over 153,000 miles. Even with the high amount of miles it runs great. I pretty sure the water pump has gone out though. The car will rocket to speed very eaisily. It gets about the same gas miliage as my brothers 1994 Chrysler LHS ant it only has a 3.5 litre V6. Overall the 1990 Cadillac DeVille is a great and reliable car.