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Old Tele man · 09-12-2009, 07:23 PM

...in addition to the "life" of the oil itself, there's also the question of the "lives" of the various additives...when they're 'used up' that's when the oil is really no longer useful.

09-12-2009, 07:23 PM	#6 (permalink)
Old Tele man ...beats walking... Join Date: Jul 2009 Location: Tucson, AZ Posts: 3,034 Vibe - '09 Vibe Base (2ZR-FE) 90 day: 32.85 mpg (US) Goldie Locks - '011 Cruze LTZ 90 day: 28.75 mpg (US) Thanks: 51 Thanked 266 Times in 204 Posts	...in addition to the "life" of the oil itself, there's also the question of the "lives" of the various additives...when they're 'used up' that's when the oil is really no longer useful. __________________ • 2011 Chevrolet Cruze LTZ 1.4LT 6A • 2009 Pontiac Vibe 1.8L/SIDI 4A • 2004 Pontiac Vibe 1.8L/MFI 4A • 2003 Ford Focus ZX5 2.0L/Zetec 4A • 1971 Dodge Charger 318 3A • 1970½ Plymouth AAR 'Cuda 340/6BBL 4M • 1968 Dodge Charger 383 3A • 1967 Plymouth Barracuda Formula S 383 4M • 1965 Plymouth Barracuda Formula S 273 4M Last edited by Old Tele man; 09-13-2009 at 08:50 PM..