I should add that the 2 quart AC Delco oil filter is readily available and only costs a few bucks extra. It also makes changing the filter a breeze since it hangs down and clears the things that made the 1/2 quart filter harder to remove. The additional oil capacity from that filter is one thing but the 4 times increase in filter area is also a very good thing as is the added cooling from the additional oil. I traveled a lot in the Western mountains always towing and after almost 100,000 miles I do not have any oil issues.