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Well after I posted this I did a search, should of done it before posting I know, but I am still a little confused. I was reading a post (actually a lecture on oil, oil 101, oil 102 ect....
Conclusion being that most engine wear occurs at start up and using the 0 and 5 -30 will protect the car as good as the higher 40s and 50s as most have the same protection at operating tempatures. The lower number supposedly flowing better at start up. I guess the old notion higher viscosity protects better is not always correct.
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