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Pros and Cons of Putting Synthetic Motor Oil in a Ford Model A
Ask Your Stickiest Question. . . Or ask us something you’ve always wanted to know about using our products. We’ll sort through all the submissions and present the best questions to our automotive experts. We'll share the questions and their answers here.
Pros and Cons of Putting Synthetic Motor Oil in a Ford Model A
I have an antique 1929 Model A Ford. I'm trying to be as nice as I can to the old girl. Would there be any advantage or disadvantages to using a synthetic motor oil in this vehicle? Right now I am using conventional 10W-30 with a can of STP per oil change.
-- Wayne Askew, Salt Lake City, UT
We assume this is a relatively low mile vehicle. As such using full synthetic oil may not be cost effective. As you already know, there are many advantages to using Mobil 1 in a vehicle but we are not sure many would be top of the list for your vehicle.  We think there are still some good reasons for using a synthetic, including better high temperature viscometrics, by using Mobil 1 15W-50 in place of your current conventional oil plus an oil additive. Use of an oil additive can lead to higher levels of piston deposits and by using Mobil 1 you will minimize these deposits and also possibly clean up any sludge deposits.   
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