Just for the hell of it, go to a Toyota dealer, get an oil change/oil filter/new oil drain plug gasket, air filter and basic checkup, they use Toyota oil and Toyota filters, not much better out there, change it every 3k after that and air filters/windshield wipers every 12k or once a year, have a really good alignment done to save tires (rotate/rebalance every other oil change) and wear and tear elsewhere. I don't recall if the 92 has the cabin air filter, if it does, change it at the same time.
if you have not had a tune up, fuel filter or timing belt done according to the schedule, do it. run excellent fuel and enjoy.