Synthetic Oil

[Werner]

Hallo Bob. What you write about synthetic motor oils is mostly correct. But not this assessment:

Synthetic oil needs changing every 500 miles. False! My habit is to change the oil once a year regardless of the miles driven. It is a rare occasion when one of my Model A's accumulate over 2500 miles in a year. However, even if one of my Model A's accumulated 10,000 miles, I would only change the oil once a year.

Regardless of which engine oil is used, the change intervals are always very short for a motor without a fine oil filter. This is because dirt such as dust and combustion residues, soot, oxidation, etc. is constantly pumped through and sprayed in the oil circuit and can thus increase friction wear. That is very bad for all camps!

In the filterless A, the oil is not changed because it has gotten worse, but because all the dirt remains in it. It must canged in short intervalls.