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Fast Eddie · 02-21-2004, 05:58 PM

New engines do NOT come with synthetic oil.

The GM oil life system is calibrated to conventional oil; syn does not break down anywhere near 7500miles, unless its under VERY stressfull conditions, like driving constantly in high heat at 5K RPMs.

02-21-2004, 05:58 PM	#29
Fast Eddie V.I.P. Member Join Date: Nov 2003 Location: lookin' at you in the rearview Posts: 779	New engines do NOT come with synthetic oil. The GM oil life system is calibrated to conventional oil; syn does not break down anywhere near 7500miles, unless its under VERY stressfull conditions, like driving constantly in high heat at 5K RPMs. __________________ I'm on a boat.....