See also:

Fuel E85 (85% Ethanol)
If the vehicle has the 3.9L V6 engine (VIN Code M), you can use either unleaded gasoline or ethanol fuel containing up to 85% ethanol (E85). See Fuel. In all other engines, use only the unleaded ...

2012 Buick Regal Review by Warren Brown
It was a good car, but something less than the “high-performance variant” of the Buick Regal promised for market delivery in the spring of 2012. That will be the overtly sporty Regal GS, with ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...