TomSeller
Super Member
You can insist that "ALL" engines theoretically use some degree of oil.
If it's so little, you can't even see it, then it's a moot point.
For many, going 20k is not going to be a problem.
My vehicles could definitely do that, without needing any oil added.
Oil that gets discolored must contain some byproduct of combustion which could be offsetting the oil usage?