Can you tell me what oil requirement code you nedd for the new models?

[Ruby Fan]

I have a C-4 and the oil requirement code is GM 4718(the code spec that meets GM approval for use in Vettes). How about u folks who have new models: do you know what the oil spec code is? It would be in your owners manual. Thanks

 

[twiget]

The owners manual says GM 4718M. Guess the spec has been revised a couple times since the C4's.

Jason