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Last oil analysis showed a nitration Level at 25 A/cm.. the oil have 6000 miles on it, just a standard 5W-40 syntetic oil. My question is, should i be concerned? The lab told me: "Some nitration... Just change the oil"

I have used M1 0W-40 before, but i had high oil consumption......switching over to VSP 5W-40 and oil consumption allmoust drop to 0 i also try the RP HPS 10W-40 and oil consumption also dropped, But since RP HPS have no approvals i stick to VSP 5W-40 that have the A3/B4 and Porsche A40...

Thank you for all the feedback, i change my oil at 5000 miles, not 800, sorry i was wrong there, hehe, Porsche say that OCI is 10000 miles, but the opinion from several independent Porsche specialists and owners, suggest 5000 miles as the OCI for these M96 and M97 watercooled engines, and i am...

Hello I am planning to use QMI engine treatment on my next oil change for my 911 carerra S, Do anyone have experience With this stuff? A local dealer here in Norway highly recommend it for me, but i am a little sceptic, i change oil every 800 miles and uses Valvoline Synpower 5W-40 and Royal...