Date: 29 Oct 2001 19:57:14 GMT From: saab85900nopsamcom (Saab85900) Subject: Re: Does anyone use synthetic oils?
>f you read Amsoil's literature, they claim that their and other oils are >all tested by the ASTM (American Society of Testing Materials, or something >like that), and that this is the only body that is approved for oil testing. The American Society of Tests and Measurements established standardized test methods. These tests are done to specific standards, times, pressures, temperatures, etc. They are therefore readily reproduceable in any lab. >It seems strange to me that Amsoil would go to all the trouble to >down engineer an oil. More likely, it seems to me, is that this stuff is >just their regular oil given a new name, sold at lower price, and offered >with a claim of lesser performance. The XL oils do have different additive package, lacking some of the elements which contribute to the extended drain capability. Oil analysis has shown that they are indeed quite capability of going longer than the 7500--but not as long as the others. Really designed for the quick-lube and dealer market (to overcome the screams of the uneducated about voiding warranty and not having an API symbol). Dick in Falls Church
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