Posted by 62champ on September 05, 2010 at 06:20:36 from (71.175.230.134):
Saw another discussion up on the antique car club forum I frequent that got me thinking about my newly acquired SC.
Both of my Studebakers have solid lifters and a decade ago many club members started recommending diesel grade oils because many regular gasoline grade oils were moving away from the additives needed to help preserve those solid lifter engines.
A few years ago, diesel oils started moving on to a newer rating (CJ - low sulfur or something like that) that cut down on those helpful additives. Now many older car owners are having to add ZDDP to the sump with each oil change to try and keep everything under the valve covers happy.
I guess I am wondering if I need to watch what kind of oil I put into my C123 (went with TSC's 15W40 diesel grade the first refill a few weeks back) or am I being an over-protective owner?
My uncle used to tell me that back in the day (40s & 50s) he never changed the oil in any of his tractors. He said they usually leaked enough that they would need a quart every week or so and with a filter change every three months you were in good shape...never had any breakdowns because of oil problems...
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