Gt-R oil vs Z oil
When purchasing my car my friend; who also owns a Z, told me to ask the dealership to put in the Gt-R oil instead of the z oil for the 15000 tune-up. I wasn't paying for the tune-up the previous owner was, so I told him I would pay the difference between the two oils. My car is now running the Gt-R. Ok, it's doesn't have any advantage for me and was a waste of money, but is it causing harm?
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