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Old 02-21-2021, 04:52 PM   #4
nkaminar
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Join Date: Jan 2012
Location: Western North Carolina
Posts: 3,897
Default Re: Synthetic Oil for Model A

100 years ago, the standard recommendation when changing oil was to fill the crankcase with kerosene and run the engine until all the sludge was dissolved. Then drain out the kerosene and fill the crankcase with fresh oil. One trick I used to do with my Model T was to jack up the front end or run the front of the car up a ramp to drain out the oil in the rod pans. I am sure not everyone will agree with the kerosene method. Otherwise, use a good grade of multi grade detergent oil and run the car non stop for 100 mile, drain out that oil and fill with fresh. For the 100 miles, if cold out, cover part of the radiator to really warm up the engine. Or put in a 160 degree thermostat.
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