Synthetic oil, which ones are good? Options

[frosty]

I haven't looked too much into yet but was wondering which synthetic oil you prefer. Any good or bad comments on them?

I just wondered since it's getting close to time for my oil change and I got some pretty high miles. I thought about a tune-up and synthetic oil. Oh yeah, whats good for the trans? I got my ideas. Now I want to hear yours.

[95STHATCH]

I switched to synthetic oil (Castrol gtx) at about 120,000 miles. It starts better in cold weather,runs smoother, seemed like a tiny tiny tiny bit more power( i could be wrong). I wish I hadn't switched though because now it leaks oil really bad,a quart and a half in a 5 day work week, and it cost alot to keep oil in it. Synthetic oil isn't bad, but switching to synthetic at a higher mileage will show you problems that you would have otherwise not seen,like worn gaskets. When I get a brand new car I will put in synthetic but not in another used car or motor. Besides an engine gets accustomed to the type and grade of oil it gets on a regular basis

[exxtractor]

Nycelica I think you have it backwards, shouldn't you use the thinner oil 5W10 in the winter, and the 10W40 in the spring summer. Its cold, so you would want a thinner oil?

In regards to 95SThatch, dude a 2 quarts in a 10 working days. That is absolutely terrible. Any gain you get by using systhetic is probably lost with all the cost of putting oil in to the vehicle. I'd switch to 10W30 maybe Quakre state max life, or valvoline high mileage.