Hi, Im new to the forum. I have a new '09 Infiniti G37S 4dr; it came with Nissan Ester Oil 5W-30 I had my 1st oil chg @ 3800mi & analysis by Wear Check in N.C. It looks a lot like another Post: '08 Infiniti G37: Hi Silicon & Cu. I think HI iron & copper is typical of the break-in period; I didn't take mine to the track, but I do drive with 'spirit'! Since your silicon dropped a lot from the 1st oil change, I think that Nissan puts in a break-in additive in the Ester Oil; the mechanic said he thought so; Im going to Nissan Hdqtrs soon so maybe I can find out. In my BMW X5 & Toyota Highlander, I have always used M1 synth & Castrol full synthetic & typically went 8-10,000mi & changed it when the TAN doubled from its baseline; its too expensive to test for TBN & TAN.
Any thoughts?
Any thoughts?