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Old 03-02-2010, 02:54 PM
Richard Martin's Avatar
Richard Martin Richard Martin is offline
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Join Date: Mar 2000
Location: Greenville, NC
Posts: 14,502
Quote:
Originally Posted by IntegrityGuy View Post
I thought you were only supposed to use SAE 30 or 40....
some people are saying they use 10w30. I was told not to use these because they have harmful detergents.... am i wrong???
All of my manuals say to use 10w30. What is harmful about detergents?

This is what the inside of an engine looks like if you don't use detergent oils.



This was common to see before they started using additive packages containing detergents in oil.
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