Car Court

Posted by Craiger56@aol.com (A) on January 09, 2005 at 17:55:32

In Reply to: What's the word on sythetic oil? posted by albee33 on August 14, 2004 at 22:41:24:

A few years ago the feds had the oil companies reduce the amount of phosphors in conventional motor oil to help extend the life of catalytic converters. I think phosphors has been eliminated altogether (anybody know?) Phosphors is used anti-wear additive especially usefull to protect cam lobes and lifter faces.

This is the first step back in motor oil performance so if you want the very best it's going to be a sythetic oil.

Is it really necessary? Not really, but for me changing oil was part of my daily work for 19 years as a mechanic so I'm not real big on changing our oil, that's why I use sythetic in our 88' Mazda 626 turbo and 86' Mazda pickup and change it religiously every 10,000 miles.

Last I heard, Corvettes, Vipers, Porsches and Audis come with sythetic oil in them, the recommended interval for the Porsche Boxter is 15,000 miles and the Audi is 10,000 miles.

In my experiance sythetic is a must for turbos to prevent coking of the turbo oil drain hose and the only cars that needed their oil changed every 3000 miles were the air-cooled VWs because they had no oil filter, only a screen.

Best wishes, Craig