Posted by MikeC on Saturday, April 03, 2004 at 8:26AM :
In Reply to: Re: Amsoil. Is it worth it? posted by Marty on Thursday, April 01, 2004 at 6:12PM :
That's why you would use a synthetic in combination with a high quality filter.
Many trucking companies run extended service intervals by only changing the filter and topping off the oil. Many of those trucks have 500,000-700,000 miles and are still running strong (I spent 10 years in the LTL industry).