I'm at 8k miles and I've yet to change from Ester oil. I don't think there are any advantages or disadvantages (other than price) to running it other than maybe a slightly less noisy valvetrain. I will be switching over to Redline 5w30 for my next oil change and then back to Nissan Ester oil after that (because its already paid for + I want them to keep records that I go back for regular maintenance)
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