At 03:59 PM 11/18/98 EST, you wrote:

>Also I have
>heard that if you change just your filter every 6k miles and just add the
>quart of oil that comes out with the filter, that you can extend your oil
>change durations from 6k miles to 10k miles or more...
>Ken Wilford

Somewhere I have one of the first magazine ads introducing Mobil1 (early
'70s?) in which they were claiming oil changes of 25K miles/once a
year...probably had to knock it off because of pressure from manufacturers
(they now want you to follow mfgr's rec's)...hhmmmm, they sell more oil
this way, right?

Austin