I do my landcruiser every 2.5k but oil is free so yeah, haha. Do my old mans camry every 5k.

Also make sure you ask what oil they're using because I know a dealership that I may or may not work at that only uses 10w30 in everything now that is designed for the VVTI engines not that it will probably matter in the 86 but they get old land cruisers in sometimes and just get told to use that oil, I use oil from hino for the diesel trucks in my cruiser so its good.