[PeteKz]

Inmates: This is a recent article about Blackstone Labs' tests of oil based on age and number of miles of use. The bottom line is that modern motor oils do not deteriorate over time, but with cumulative use. This article and conclusions correspond to the results of my oil testing on several of my vehicles, one of which I drive regularly, and the others which I drive irregularly.

Many of you like to change your oil frequently based on time (6 months to a year), but the evidence indicates that is not necessary. Throwing away more used motor oil isn't good for the environment either.

Oil analysis costs about $30 at Blackstone Labs, so that's small compared to an unnecessary oil and filter change. If you really want to know what's happening inside your engine, it is the best test you can do. Given that most of our cars hold between 10 and 12 quarts of oil, they have a lot more oil than the average v8 engine with a 5-6 quart sump, so the oil should last roughly twice as long.

www.thedrive.com
Motor Oil Age Doesn’t Matter as Much as Mileage: Study
An oil testing laboratory has found that the conventional wisdom of six-month oil changes might be a waste of your money.
www.thedrive.com www.thedrive.com