Here we go again

IDZRVIT · 04-04-2010, 09:23 AM

Quote:

Originally Posted by 370Zsteve

Anything over 240 is bad. Anything under 240 is normal. This applies to any engine, not just the VQ37.

I doubt anyone will go near 240 unless they are on a racetrack.

You people should read this and quit yet bellyachin'

Motor oil - Wikipedia, the free encyclopedia

And it also said this:

Quote:

A key new test for GF-4, which is also required for API SM, is the Sequence IIIG, which involves running a 3.8 L (232 in³), GM 3.8 L V-6 at 125 hp (93 kW), 3,600 rpm, and 150 °C (300 °F) oil temperature for 100 hours. These are much more severe conditions than any API-specified oil was designed for: cars which typically push their oil temperature consistently above 100 °C (212 °F) are most turbocharged engines, along with most engines of European or Japanese origin, particularly small capacity, high power output.
The IIIG test is about 50% more difficult[10] than the previous IIIF test, used in GF-3 and API SL oils. Engine oils bearing the API starburst symbol since 2005 are ILSAC GF-4 compliant.[11]

The journal bearings are removed from the test engine and scrutinized for any wear. If the wear appears excessive, the oil doesn't get SM certification. Seems like there is a helluva lot of SM certified oils on the shelves of auto parts stores so they must be passing the test for GF-4.

There will always be non-believers and skeptics. I'm happy with my SM oil knowing the above.