2002 C4 Cabrio. After reading somewhere 0W40 I bought a case to the tune of $80. Then I got an owner's manual from the dealer where I got the car. It was not the manual attached to this car and I am suspicious of the date. It lists, depending on climate, 10W30 thru 15W50, no mention of zero weight. Does anyone know definitively, the weight oil for my car?

 

0w-40 is the weight you want to be running. There have been updated TSB's

 

Much obliged, Doc.