Thank you boys!

Oil has been changed at about 3,000 miles for the last 26 years...and there are a few minute leaks so if they leak more it's time to fix them.

So I'll switch today & hope the new stuff will help the old boy keep running for many more miles...

Wowa...for got something...do all you synthetic users still change the filters at 3,000 miles or so. I forgot about the soot build up factor!

thanks all!

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1986 300SDL 440,xxx