The tradition here (Australia) is not to run high mileage (HM) oil, but rather step it up a grade after something like 10 years / 100,000 miles. Eg from a 20 to a 30 grade, or a 30 grade to a 40 grade oil as the car ages, and it now carries a small amount of wear.
In fact they hardly sell any HM oils in Australia, plus all oils contain seal conditioners, and I don't believe seal conditioners do much for modern viton seals anyway.
Anybody else do the same?
In fact they hardly sell any HM oils in Australia, plus all oils contain seal conditioners, and I don't believe seal conditioners do much for modern viton seals anyway.
Anybody else do the same?