1996 Buick Riviera Owner's Manual - Page 232

1996 Buick Riviera Manual

Page 232 highlights

Fuel If you have the 3.8L supercharged Code1 en.@ne,in an emergency, you may be able to use a lower octane'-- -as low as 87 -- if heavy knocking does notoccur. I you f are using91 or higheroctane unleaded gasoline and you still hear heavy knocking, your engine needs service. 6-3

We apologize, but we cannot currently deliver this PDF manual by request of the manufacturer.

We apologize for any inconveniece.