What type of motor oil should i put into my 1985 Cutlass Supreme Brougham?

i own a 1985 Cutlass Supreme brougham it has a v6 engine. on top of the motor oil cap its says to use ';sf'; or ';sf/cd'; or ';sf/cc';. what do those numbers mean? And on the oil meter rod it has a long number sequence ending in a 'w'.What type of motor oil should i put into my 1985 Cutlass Supreme Brougham?
Any oil will do. SF was the standard that had to meet way back when the car was new, most oils exceed that standard by far now. Check the oil container and if the letter after S is further down the alphabet your good.What type of motor oil should i put into my 1985 Cutlass Supreme Brougham?
SF = Service Factor





CD and CC is American Petroleum Institute classification for engine oil type.





On the dipstick the long numbers and letter is type of part number for dipstick itself. It has nothing to do with type of oil.





On your car, depending on mileage and climate, I would use 10w/30 or 10w/40 oil.





I've found a link for you on automotive abbreviations. Hope it helps you.
Use a common motor oil, 10W30 or 10W40 will do just fine. All the extra letters are ASE ratings which have long expired. Today's oil will work better.