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Grades of motor oil

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SurreyGuy | 16:05 Sun 18th Jun 2006 | Motoring
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What do the numbers (15/40, 20/50, etc) in the grading of motor oil mean?


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Avatar Image Ethel
Explained here:

http://en.wikipedia.org/wiki/Engine_oil
16:45 Sun 18th Jun 2006
Avatar Image SurreyGuy
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Thanks Ethel


Having read the info, I wish I hadn't asked now! It's clear as mud! :o)

17:26 Sun 18th Jun 2006

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