Quote:
Originally Posted by Hi-Step'n370Z
This may suggest that if someone is having an unusual oil problem, after the break in period, when they do the first oil change, they should stay with the Ester oil, and really drive the Z to help what 6MT described happen in the engine, then go with the better lubricating synthetic.
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Remember also, that the 1200 mile break-in is just a recommended number to get everything working well together. Gears, differential etc. Many motors take well more than that to truly beak-in and stop using oil. 5, 10, even 15K is not unusual in some cases..