I just found out that when I took my car to have an oil change and transmission (transaxle) fliud change done, they put pennzoil 10/30 for both tranny and engine. Now, I have heard that 10/30 is okay, but my car is a 88 civic. It has 103.000 miles on it, should it be necessary to consider maybe another oil for the tranny?? It shifts kinda rough and sometimes it's so hard to get in gear... This has happened to me like 3 times already. I'm at a stop light with a bunch of cars behind me, and the light turns green and it won't get into gear!! people are honking their asses off, and then, after like 10 seconds or more of hammering the shifter it will. Should I think this is part of normal wear and tear?? OHHH OHHH, BTW, previous owners were women. (got nothing against them)