My car is in perfect condition except one problem. Every morning when I start my car, for almost 45 seconds a loud knocking sound comes out of the engine then it comes to normal. I am using 20-50 viscosity Havoline engine oil.
Please advise me about using a sinthetic oil instead of a conventional. I heard that if a car is not used to a sinthetic oil and ultimatly switching to a sinthic oil could damage the engine seals.
have the same problem?
Friday, April 21st, 2006 AT 9:30 AM