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Re: oil problems
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Posted by Gene Davis (Ga.) on September 07, 2005 at 19:41:53 from (69.19.14.23):
In Reply to: oil problems posted by Mike in Ind. on September 07, 2005 at 18:51:38:
The designation HD30 probably means high detergent 30 wt.oil. It may be a very low additive package, but still qualify as a detergent oil. Look for the API symbol on the back of the container. It will be a circle with some letters around the edge. These letters tell you the type and quality of the oil you are buying. If it is for a gasoline engine look at the "S" designation and read it as the further into the alphabet the second letter is, the better grade the oil additive package. Thus a SE oil would be a lesser detergent package than a SG oil. If it is for a diesel engine look at the "C" designation and the same applies for the second letter here also. A designation of a CC oil would be a lesser detergent package than a CD grade oil. It is better to buy oil by looking at these specs and the viscosity index than to worry which brand is better or worse. I seldom look at the brand I look first for the viscosity index number, then I look at the API (American Petrolum Institute) classification designation and I remember also that there aren't that many different refinerys producing oil. Many of the brands are packed for the customer by the same refineries and just labeled differently. Hope this helps you understand it a little bit better. I used this system to run the daily lube truck for a large mining company for a number of years and never had any problems.
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