i have a 91 loyale, 5 speed. i changed the oil in the trans. but i just used some 80w90 i had lying around in the garage. my question is what oil should i use? i heard royal purple makes some good stuff. i was just wondering if anyone knew what oil would give me the best result without having to find out for myself! thanks!

I say oil's oil, if it lubricates it should work. Of course Royal Purple is good high performance oil, but you probably wouldn't notice the difference with 90hp