Posted by karl f on December 13, 2010 at 22:17:15 from (172.129.219.222):
In Reply to: Re: Supertech oil posted by Wardner on December 13, 2010 at 09:48:23:
And to add my thoughts to Wardener's link: my observations have found most Non-Detergent oils to be SA and/or SB-rated oils. SA is prior to 1930 and SB is prior to 51. However, I don't believe they used those designations until the late sixties. I have a ford and an ih operator manuals from about 1968 that mention grades of ML, MM, MS, DG, DM, DS; and then specify MS for gas and DS for diesel; IH also says to use "series 3" for diesel. The IH book converts those to SD/CC and CD . IH says LP gas should be low ash meeeting MS supplement 1(no new code)...and this type of oil is usually labled for LP gas. But then to confuse it all, IH also said for the gasoline engine "DO NOT use 10w30." go figure...likely for noise anyway although maybe they hoped thicker oil wouldn't lead to torched valves. So there is a lot of details to consider, even though it's actually relatively simple.
at any rate, I wish the myths about oil that are truly BS would have never been circulated in the first place.
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