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user removed · 12-07-2015, 09:11 AM

I can smell a bad oxygen sensor or head gasket following a car on the highway. A cold engine smells different before the catalyst lights off. I never smelled a difference between fresh oil and old oil after an oil change.

regards
mech

12-07-2015, 09:11 AM	#5 (permalink)
user removed Master EcoModder Join Date: Sep 2009 Posts: 5,927 Thanks: 877 Thanked 2,024 Times in 1,304 Posts	I can smell a bad oxygen sensor or head gasket following a car on the highway. A cold engine smells different before the catalyst lights off. I never smelled a difference between fresh oil and old oil after an oil change. regards mech