What grade oil on a six SC 3.0 and up, I know...can of worms... Options

[Mark Henry]

I see Porsche classic oil for 3.0-up is 10W60, also seeing 10W60 as a recommended fill from others.
I'll be using a dino break in and dino oil for the first few changes on my new engine, just wondering what others think of this weight.

Are the new synthetic better at transferring heat now and do they still have leak/weep issues?

Honest not looking for a fight.... (IMG:style_emoticons/default/hide.gif)

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[gereed75]

I have been just as confused as anyone reading articles from a variety of experts and still don't know. Always liked the idea of synthetics. My understanding is the more leaking idea came from the early synthetics that did not include seal conditioners - since addressed. On and on about ZDDP ......forever.

And so in my newly rebuilt 2.4 six I am running Mobil 1 15/50. Read their literature https://mobiloil.com/~/media/amer/us/pvl/fi...specs-guide.pdf
It is high in ZDDP and Phos. Not as much as their "air cooled v twin" blend made specifically for Harley's, but more than their blend made specifically for Porsches (yes their on line product info lists a special Porsche blend - not sure which Porsches nor where you might find it???)

Best part is the 15-50 is readily available, I get it at Pep Boys in the 5 liter bottle.

Find something that makes you feel good and go for it. I suspect that all of the higher ZDDP stuff from a reputable vendor is all good. Good luck.

Oh yea, Henry Schmidt from Supertech recommends one of the Rotella grades and I trust his judgement and experience, but there is a big article somewhere on line that says the diesels don't test as well as Mobile 1.