Re: Modern Engine Oil Okay?

Posted by Larry Jenkins on April 21, 1997 at 20:47:03

In Reply to: Modern Engine Oil Okay?
posted by Eric Lowell on April 21, 1997 at 20:17:42

: When I had my first "A", I dumped anything in the crankcase
: that closely resembled oil. Would I be looking for trouble
: to use a 10-40 or 20-50 modern oil, presuming that I change
: it before it turns black? Thanks!
: Regards from Maine, Eric
Hi Eric..
Over the years, there have been many articles in the MAFCA and MARC magazines regarding the use of detergent oils in the Model A written by their Lubrication Engineers.In all cases, as far as I can recall, not one of the articles said that detergent oils were harmful to the babbit bearing materials in the Model A engines.I have used 10 W 30 in my B engine with no harmful effects.I do have an oil filter which I highly recommend to filter out the dirt and minute particles, as detergent oils hold that material in suspension, while non-detergent oils allow that stuff to settle in the bottom of the crankcase.Another popular opinion, only use detergent oils in a newly rebuilt engine.I'm sure there are many out there who will dispute this opinion, but the oil guys seem to rule supreme.

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