Appears the only major Model A Forum answer not yet agreed upon by all is: If you ask which Model A engine oil to use -- but don't give up -- we are all still working on it.
Participating on this forum is a lot like many social occasions; if you're new to the group it might help to have some "ice breakers" or conversation starters. Herewith - for the uninitiated - a short (and, no doubt, incomplete) list of Model A subjects sure to get things going:
a. Ethanol;
b. Detergent vs. non-detergent oil (together with the associated pressurized oil systems and the use of an oil filter);
c. 6v vs 12 v (and +ive vs –ive ground) electrical systems;
d. Alternators vs generators;
e. The existence (or not) of vapor lock and it’s many remedies;
f. The efficacy of modern “upgrades” (electronic ignition, adjustable lifters, etc., etc.);
g. 19- and 21-inch vs 16-inch tires (and the associated radial vs bias ply controversy);
h. Inserted vs poured-in-place bearings;
i. Non-original body colors;
j. Reproduction parts
k. Stainless steel bumpers;
l. Modern spark plugs;
m. Sealed beam/halogen headlights and/or LED brake lights incorporating directional lights;
n. Hydraulic brakes;
o. Modified engine rear oil seals; and
p. Acceptable number of blades (and year of manufacture) on the engine fan.