Domestics OEM meaning Ford and GM and routine problems: Intake Mainfold Failures Premature and Freq.Gasket Failures (pick a gasket or seal) Excessive oil consumption piston slap electrical issues premature rotor failure premature sealed bearing/hub failure premature power steering failure premature water pump failure etc......... European Import Issues Electrical ignition parts water pumps fuel pumps sludge Toyota Sludge PCV issues Head Gasket Issue on select older truck V6's recent steering knuckle recall to listen to some you would think that these OEM's are all powerful all knowing and out to bring truth, love and justice to all! To me I see a bunch of people trying their best to comprimise and still end up with something close to the products origanal vision. Most problems in the Automotive world are caused by bean counters in purchaseing!!!! Usualy even a novice can look at something that is questionable and see that it is not going to hold up or work as origanaly designed. The problem is that often a part or system is not re-valadated simply because of a simple change or 20 small different un-related changes. This is when things go terrable wrong. I do not see where someone questioning a recomendation from companies with the above track records is that bad! Do you question your doctor and take an active role in your health care or do you simple set back shut up and do as you are told?? I would think it dumb not to actively particapate in my health care!! I also tink it is not to bright to blindly follow recomendations concerning your car. No one knows your driveing habits and environment like you do! No single recomendation could ever fit ever possable usage model. This is why I like the vanishing SAE Temp./Viscosity chart that used to be common place in owners manuals!