The Ford Barn - View Single Post

WHN · 02-20-2018, 07:03 PM

20-50 oil is good for 15f to 110f. 20w at 15f, 50 at 110f.

Our Model A without a thermostat runs around 165 degrees in summer after good drive. Water only with rust inhibitor.

A well maintained Model A engine, driven only in summer, I do not believe needs a thermostat. 90 years, what has changed?

02-20-2018, 07:03 PM	#7
WHN Senior Member Join Date: Mar 2017 Location: Connecticut Shoreline Posts: 2,067	Re: Oil viscosity (weight) for model A 20-50 oil is good for 15f to 110f. 20w at 15f, 50 at 110f. Our Model A without a thermostat runs around 165 degrees in summer after good drive. Water only with rust inhibitor. A well maintained Model A engine, driven only in summer, I do not believe needs a thermostat. 90 years, what has changed?