[jcp123]

Man, I don't remember the trans fluid...I think it's ATF IV. The coolant I have no idea, but I used the green "universal" coolant. I won't say zero problems since a busted radiator was the problem which was my pretext for moving on. I doubt it was the coolant, but I won't tell you it wasn't. I'd have thought the water pump would have problems before anything else with the improper coolant.

With spring coming up, run the 5w-30 for sure. I'd be reluctant to move to the 10w regardless of conditions - in the dead of winter the thinner oil will flow more quickly where it needs to go. I wouldn't worry about moving to synthetic or synthetic blend if you want - I ran Pennzoil Platinum in my Echo with no additional leaks or consumption. When I let it go it had just over 270,000 miles on it, and oil was certainly not a concern.