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Old 02-20-2018, 05:20 PM   #4
WHN
Senior Member
 
Join Date: Mar 2017
Location: Connecticut Shoreline
Posts: 1,136
Default Re: Oil viscosity (weight) for model A

We have owned our 1929 Sport Coupe for 40 years. Drive it about 200 miles per year and change oil ever spring.

We use 20-50 Walmart oil (four quarts) along with one 16 oz blue bottle of STP. Marvel Mystery Oil in gas.

Oil pressure in summer after car has been driven 20 or so miles 3 to 4 lbs.

Good compression (all mid 60’s), no valve noise, never over heats.

Everyone has their view, but this has worked for us. Enjoy.
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