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donv · 01-06-2005, 01:27 PM

15-50 for warm weather only use in New England. I was uncomfortable with trusting the additives to fully protect the engine at high temp and it was silly to run the risk when I seldom drive the car at low temp (so I don't need the 0w- part). I had read an article claiming that the only way they get a wide spread on the cold/hot viscosity is through the additives, which are subject to breaking down. Once they do, you're drifting to the lower end of the rating for the "resulting" protection when hot.

01-06-2005, 01:27 PM	#4
donv Registered User Join Date: May 2002 Location: NW of Boston, MA Posts: 697	15-50 for warm weather only use in New England. I was uncomfortable with trusting the additives to fully protect the engine at high temp and it was silly to run the risk when I seldom drive the car at low temp (so I don't need the 0w- part). I had read an article claiming that the only way they get a wide spread on the cold/hot viscosity is through the additives, which are subject to breaking down. Once they do, you're drifting to the lower end of the rating for the "resulting" protection when hot. __________________ 2001 Lapis/Black/Black, PSM, Rear Speaker Kit, Optima...