Quote:
Originally Posted by Black&Tan
I bought an 05 Solara convertible with 45,000 miles. I hope to drive it for a long time. Is there any advantage to switching to synthetic oil at this point? I do not have any idea what kind of oil was used for the first 45,000 miles.
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Mainly in that you can run it twice to three times as long than "regular" oil.
If you aren't doing a lot of short trips, then you can pretty much change it every 15,000 miles or one year - whichever comes first.
Theoritically, you can change the filter at half that and freshen up the oil.
You can do that too with a good synthetic mix, too.
One thing that synthetic will give you over regular oil is protection against sludge and of course it's better for cold and extreme cold starts.
I only run synthetic after I've broken in the rings - usually 10,000+ miles. Doing it before that will only lose slightly more gas until the rings set. But it won't hurt the engine.
Synthetics
need less but use better additives so synthetic doesn't break down/shear as much over time either.
Alan