[e36]

From what I can tell, the average American drives somewhere between 12,000-15,000 miles a year. The average oil change interval for modern cars is 7,500-10,000 miles, so using the higher interval you would expect to change your oil roughly twice a year.

[saltcured]

I believe these published averages are arithmetic mean and may be skewed by long-distance drivers and multi-car households. As reported, it seems to be just total fleet mileage divided by number of drivers.

For this kind of question about maintenance, I wish I could find a histogram or at least quartile summaries of per-vehicle distances per year.