Originally Posted By: artificialist
Originally Posted By: 45ACP
Originally Posted By: artificialist
Guys I know tend to use heavier oils in high mileage engines because they say it helps with wider crankshaft bearing clearances in higher mileage engines. There is one problem with this idea: Not all bearings wear out at the same rate. Some engines are like tin cans with marbles in them at 90,000 miles, some are like new after 200,000 miles.
The Nissan VG engine is the biggest example I know of. VG30 engines easily went 250,000 miles, but many VG33 engines were in terrible shape at 150,000 miles.
These must have been the 300ZX engines, then.. which one was the turbo in the 1996, the VG33? What grade of oil is best in these engines? (GC?)
EDIT: NM.. craving a nissan now.
http://en.wikipedia.org/wiki/Nissan_VG_engine
What grade of oil for VG30.
Correct. The VG30 was in every Maxima between 1985 and 1992, every V6 truck from 1986 to 1996, every 300ZX from 1984 to 1996, and every Quest up until around 1998.\
Anyway, what I have seen under the hood of most VG30 powered cars, turbo or not is 5w30 when always below freezing, 10w40 when always above freezing.
I would use 10w40. Many reports in the UOA section get better results, even in Nissan engines that called for 5w30 at all temperatures.
Would you use 0W-40 in there? Just a question. I really like the sound of a Twin-Turbo 1990-1996 300ZX.
(Was the twin turbo variant 1996 only? or 1990-1996? Please let me know.) If 0W-40 is ok.....