10/20 or 10/30 for tuned 14.5 psi 3.5l ?

[TopherSho]

With increased boost you get increased cylinder pressure,  and with age more blow by.  By those two reasons,  should I OPT for 10/30 instead of 10/20 synth ?

Secondly.  increased cylinder pressures mean more wear on contact surfaces.. what do people think of 1/2 a dose of ZDDP per oil change ?

Thanks!

[MiWiAu]

I'm tuned @ 14PSI and I still run 5W30, although, I'll be switching to 0W30 at my next oil change.

My opinion is to stick to factory spec, with perhaps a slightly lighter cold temp viscosity.

Stick with a high quality synthetic and additional additives are not necessary.


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