Re: OT Question For Brain Trust.


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Posted by Paul B on Friday, June 22, 2007 at 22:27:08 :

In Reply to: Re: OT Question For Brain Trust. posted by Ugg (in Uggville) at IL on Thursday, June 21, 2007 at 09:50:02 :

As vehicle manufacturer's requirements change, API (American Pertoleum Institute) changes the specifications for teh engine oils. The higher the letter designation meeans it meets the all of the requirements of the lower letter designation in addition to the current designation. I have a can (remember when oil came in cans?) of Kendall 20W-50 racing oil with a designation of CD, it was made around 1980. It seems that every couple of years the letter jumps up one more and the older oil is discontinued. To find the SF oil, you might find old stock at a commercial supplier.



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