Question about 2000 Chevrolet Prizm

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Which grade motor oil to use?

I have a 2000 Chevy Prizm. Initially, I used 5W-30 motor oil per manufacturer's specs. After I moved from western NY to FL, the car started consuming oil at an alarming rate. At the time I didn't realize this is a common problem with this vehicle. Anyways, someone told me that the 5W-30 was too thin to be practical in the hotter climate and that a 10W-40 would help. I switched to 10W-40 and it did help quite a bit. It did not solve the problem, of course, but the oil seemed to disappear less quickly. I have been using the 10W-40 ever since and am satisfied with it. However, recently my husband's friend, who claims to have worked many years for a Chevy dealer and to have been GM certified as a mechanic until a few years ago, has told my husband that we should be using SAE 30 oil. I looked up some information and learned about the different ways and temperatures of oil testing, etcetera, etcetera, and it seems that it would be beneficial to have 5W- or 10W- grade of oil. But I'm still unsure and a little foggy - and unless I have concrete reasoning I will not be able to dispute the info my husband received. (Incidentally, I know WAY more about cars than my husband - he doesn't even know how to change a tire whereas I've replaced an alternator by myself - but still he will believe his friend unless someone else besides me tells him otherwise...) Any help and information is very much appreciated!

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  • smms6776 May 14, 2009

    All he said was SAE 30, but specified NOT 5W- or 10W-. Thank you for the suggestion - I'll see what info I can find.



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Did your husband's friend say anything about synthetic oil? In my opinion i would never use that light of oil(5-w30) in anything its just to thin, to me its like putting water in the crankcase. The only reason the manufacture recamends it is because of gas milage the thinner the oil the less resistence the engine has to turn over hense better fuel milage. If it were me i would do some resurch on synthetic oil.

Posted on May 12, 2009


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