H3 L5-3.7L (2007)
Fuel: Technical Service Bulletins
Engine/Fuel System - Additive Information
INFORMATION
Bulletin No.: 05-00-89-072B
Date: June 17, 2008
Subject:
Fuel and Oil Additives - Facts and Myths/Maximizing Fuel Economy
Models:
2009 and Prior GM Passenger Cars and Trucks (including Saturn)
2009 and Prior HUMMER H2, H3
2009 and Prior Saab 9-7X
Attention:
Please direct this bulletin to the Service Manager, the Service Consultants and the Sales Staff. A copy of this bulletin is encouraged to be given to
your customer as it is written with the consumer in mind. You may also post this bulletin in your customer lounge or waiting area.
Supercede:
This bulletin is being revised to add the 2009 model year. Please discard Corporate Bulletin Number 05-00-89-072A (Section 00 - General information).
A Statement About Fuel Economy
As gasoline prices have increased, the consumer has shifted priorities to become increasingly concerned with fuel consumption. GM is presently proud to
offer over 30 cars in the U.S. with EPA highway estimates of at least 30 mpg. In Canada, vehicles are rated for fuel consumption in liters per 100
kilometers. GM offers over 20 vehicles in Canada that consume less than 7.0 L/100 km on the highway. The information below contains reasonable and
prudent advice for your dealership and the consumer to get the most from every gallon or liter of gas.
The information below is presented in two easy to understand sections:
^
What Not To Do: Engine and Fuel Additives, Alternate Fuels, and "Miracle" Products
^
What to Do: Maximizing Fuel Economy/Minimizing Costs
WHAT NOT TO DO: Engine and Fuel Additives, Alternate Fuels, and "Miracle" Products
Various unproven products with claims to improve vehicle fuel economy have been reported ranging from magnets that align molecules to chemical
combustion improvers.
Most products claiming to provide benefits are based on unsubstantiated claims. Those that do present "scientific" results generally either have too little
supporting data to be conclusive, have not conducted experiments in a controlled fashion, or cannot be substantiated by anyone else but the product's
manufacturer.
The U.S. Federal Trade Commission summarizes results for products tested by the federal government at
www.ftc.gov/bcp/edu/pubs/consumer/autos/aut10.shtm. A review of the list shows that the majority did not work, and for those that showed some effect,
the benefit was too small to be cost effective.
Harmful Ideas That May Damage Your Vehicle and Increase Emissions
One more recent poor idea to improve fuel economy that should not be attempted is to blend either kerosene or diesel fuel into gasoline. Why? Both
kerosene and diesel fuel are distillate fuels meant for use in compression ignition engines, not spark ignition engines. They have very low octane and
since they are heavier (higher density) than gasoline, they will cause heavy engine deposits and degradation of engine oil.
Notice:
Never put Kerosene or Diesel Fuel in your Gasoline Engine vehicle. This may result in inconsistent performance and permanent damage to your
vehicle that is not covered by your New Vehicle Warranty.
Chemicals that are normally used as solvents also should not be used. These include acetone, ketones, and methanol. These solvents can be incompatible
with your vehicles rubber or sealing components, and may dissolve the vehicle's paint finish. In the case of methanol, corrosion of metal parts in the fuel
system also may occur.
Notice:
