I have a 1996 3.8L manual transmission Mustang and I just had the oil changed last weekend and last night I was sitting idle and it started smoking and the temp gage was going from hot to cold and cold to hot fairly rapidly. I have to fill my coolant up every 4-6 weeks because it leaks so I filled her up last night and didn't have any problems after that but it was very dark and I didn't notice any smoking. Any idea what it could be? I know how to drive it but I'm clueless when it comes to working on it....I'm supposed to drive to Cincinnati tomorrow from Columbus and I'm worried I'll have to cancel my trip if I don't get it figured out/solved.
