Excessive oil consumption

Good morning.

Oil consumption comes from either an external leak or internal burning.

If the rings are worn, it will allow oil into the combustion chamber and will burn off.

A compression test will confirm. It is a two step process. You do a cranking test first. Then retest it but this time add a small amount of oil into the cylinder and see if there is a difference. If there is more than 10 to 15 lbs, then the rings are your failure.

Roy

https://www.2carpros.com/articles/how-to-test-engine-compression