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rotorwrench · 09-21-2019, 08:52 AM

Use good common sense and you will be fine. Any oil is better than no oil but there is no reason to think the the model A engine is any different in theory than any modern 4-cylinder engine except for the obvious improvements. Ford used SAE 20W/20 for cold weather and SAE 30 for warm weather for many many years. The modern multi viscosity equivalent would be SAE 10W/30.

A clean engine is always a good idea. Detergents will do the job. Change the oil on Ford's recommended schedule. With no fancy filter, it needs to be changed more often. That's how you get the crap out of the crankcase is by draining it out more often.

09-21-2019, 08:52 AM	#3
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 17,410	Re: Oil weight Use good common sense and you will be fine. Any oil is better than no oil but there is no reason to think the the model A engine is any different in theory than any modern 4-cylinder engine except for the obvious improvements. Ford used SAE 20W/20 for cold weather and SAE 30 for warm weather for many many years. The modern multi viscosity equivalent would be SAE 10W/30. A clean engine is always a good idea. Detergents will do the job. Change the oil on Ford's recommended schedule. With no fancy filter, it needs to be changed more often. That's how you get the crap out of the crankcase is by draining it out more often.