My son purchased a 1990 toyota camry a few years back with about 120,000 miles on it. Its the inline 4 sedan. He know has about 180,000 miles on it, and the vehicles gas mileage has dropped down from about 23 miles per gallon, to about 15 miles per gallon, about 70 percent heavy urban driving. Also, at the advice of some people on this group, he switched to hi test gas, because of a lot of knocking on acceleration. The hi test cured it. The mechanic we used, suggested changing out the timing belt. We have not done this yet on this car, and have no idea, when and if it was done before we got it over 60,000 miles ago, but we assume the car was well maintained, because it was almost pristine when we got it, from an elderly lady, who commuted to work with it from new hampshire, and had her car work all done by the dealership as called for. The seats even lacked brand new. So any recommendations if the timing belt could be the cause of it, and if not, should it be changed at this point anyway. The car runs just fine, just getting lousy gas mileage, have to use hi test, and its pep has gone away, but that could be of old age also. LOL
Thanks