I personally use Mobil 1 and I am about to change the oil on my 97 GTS. If you guys use Mobil 1, which one do you use, 10-30, 20-50 etc? My GTS has 21k miles on it and though using 20-50 would be to thick. What do you guys think?
As long as the engine is in good condition, 10W-30 will be fine. Oil pressure at Hot Idle should be between 30+ for a good condition engine. Do not use 20W-50 if you live in a colder climate, it will be too thick.
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