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FORCD02
04-03-2011, 02:55 PM
What oil to use? Just bought my first GN with 47K original miles. Should I use synthetic in these motors?

Ts86ttype
04-03-2011, 03:30 PM
There has been others here with the same question... Here is a post... http://www.gnttype.org/forums/showthread.php?t=7837 What oil has been used in your car??? I like a good 10-30 and I add ZZDP for more zinc in the oil to help the flat lifter cam... Tom G.

FORCD02
04-08-2011, 08:40 PM
Guy I bought it from said he always used Castrol 10w-30 and a Lucas Oil additive with a Fram filter. Will it hurt to switch to Castrol 10w-30 Synthetic and does the Fram filter have the anti-drain back valve?

kenmosher
04-09-2011, 09:24 AM
Synthetics will only help ... as good as regular "dino" oils are, synthetics are more stable and really help with the extreme temps we see with the turbo.

ZDDP is a good thing to add for anti-scuff on our flat tappet cams, but most of the other additives are pretty much snake oil or unnecessary. The first thing I'd change is that crappy Fram filter and use one of the more quality filters Wix, Purolator (their Pure 1 series) or a Delco Gold are good choices.