Automobiles
Ferrari - "...we suggest that our customers not use alcohol fuel in our vehicles.". (1)
Hyundai - "If your engine develops driveability problems, the use of 100% unleaded gasoline is recommended.". (1)
Kia - "Discontinue using gasahol of any kind if driveability problems occur...". (1)
Porsche - "...change to a different fuel or station if any of the following problems occur: deteriation of driveability and performance, substantially reduced fuel economy, vapor lock, and engine malfunction or stalling".(1)
Volkswagen/Audi - "If you experience a loss of fuel economy or driveability and performance problems due to the use of [ethanol blends], we recommend that you switch to unblended fuel.". (1)
Motorcycles
Ducati - "Additives to fuel or lubricants are not allowed.". (1)
Harley Davidson - "You may find that some [ethanol] gasoline blends affect the starting, driveability, or fuel efficiency of your motorcycle. If you experience one or more of these problems, it is recommended you operate your motorcycle on straight unleaded gasoline.". (1)
Suzuki - "If you are not satisfied with the driveability or fuel economy with your motorcycle when you are using an oxygenated fuel, you should switch back to regular unleaded gasoline.". (1)
Lawn Equipment
Ariens (EZR Easy Turn Mower) - "DO NOT use gasohol or gasoline containing alcohol. Alcohol will cause internal parts to deteriorate.". (1)
2011 Ariens Commercial Mower Warranty now states: "Use of gasoline blends exceeding 10% ethanol voids any and all warranties..."
Murray (Lawn Tractor) - "A mixture of alcohol and gasoline will attract moisture and cause acid deposits during storage.". (1)
Poulan (Chain Saw) - Quote, "Experience indicates that alcohol blended fuels can attract moisture which leads to fuel mixture separation and formation of acids during storage.". (1)
Sears (Craftsman Tiller) - "Experience indicates that alcohol blended fuels can attract moisture which leads to fuel mixture separation and formation of acids during storage.". (1)
Briggs and Stratton - "Some fuels are gasoline blended with alcohols or ethers. Excessive amounts of these blends can damage the fuel system or cause performance problems. If any undesirable operating conditions occur, use gasoline with a lower percentage of alcohol or ether.". (1)
Small Gas-Powered Equipment
Generac Power Systems (Portable Power Generator) - "Alcohol blended fuels can attract moisture which leads to separation and formation of acids during storage.". (1)
Recreational Vehicles, ATV's, Snowmobiles
Will be added soon.
(1) Data from Ethanol RFA, Renewable Fuel Association reports published between 2003-2006.