C 1500 Suburban 2WD V8-454 7.4L VIN N TBI (1995)
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Fuel: Technical Service Bulletins
Fuel - Reformulated/Oxygenated Gasolines
FILE IN SECTION: 0 - General Information
BULLETIN NO.: 57-01-02
DATE: June, 1995
SUBJECT:
Reformulated Gasoline (RFG), Oxygenated Gasoline and California Phase 2 RFG
MODELS:
1995 and Prior Passenger Cars and Trucks
General Motors customers will be potentially exposed to a variety of different fuel types. Besides the conventional gasoline available, new types such as
Reformulated Gasoline (RFG), oxygenated gasoline, and starting in 1996, California Phase 2 RFG. Reformulated Gasoline (RFG) is blended to burn
more cleanly and not to evaporate as readily. RFG must contain a minimum of 2 percent oxygen, which is usually achieved with ethanol or
EPA-approved ethers such as methyl tertiary-butyl ether (MTBE). This type of fuel is required by the Clean Air Act in the nine worst ozone
non-attainment areas of the country, and may also be required in other areas designated ozone non-attainment, at the option of the states. RFG is intended
to produce approximately 15 percent less pollution than conventional gasoline. Using RFG should reduce the total health risk to the public by reducing
exposure to ozone and air toxins. General Motors supports the use of RFG as a cost effective means of providing air quality benefits.
Oxygenated gasolines are prevalent in the wintertime for Carbon Monoxide (CO) non-attainment areas. These fuels contain oxygen components similar
to RFG. Approximately 50 percent of the fuel sold in the U.S. in the wintertime contains an oxygenate component.
Vehicle fuel economy may be slightly reduced, if at all, by the use of gasoline containing oxygenates. Fuel economy is most affected by engine and
vehicle type, driving habits, weather conditions, and vehicle maintenance.
Properly blended RFG, oxygenated gasoline, and California Phase 2 RFG will have no adverse effect on vehicle performance or to the durability of
engine and fuel system components. In fact, the General Motors Owner's Manual fuel statements have consistently permitted the use of properly blended
fuels containing up to 10 percent ethanol (since 1980) and up to 15 percent methyl tertiary-butyl ether (MTBE) for current and all past model year
vehicles. These statements continue to be valid. The use of oxygenate-containing fuels will not invalidate the GM vehicle warranty.