Quote:
Originally Posted by rs999
Do you check your oil and air monthly? You could get away with 10K mile intervals if you did otherwise why not go every 3000 miles like garages used to recommend in the past? 
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checking that my oil is full increases my oil change interval?

Go 10k miles and tell me what Subaru/Toyota say when you ask for warranty engine work.
Considering they dropped it down to 6k for normal driving..changing it under extreme conditions 1k miles early doesn't seem that crazy.