Car Users' Guide
Most cars are fully compatible with up to 10% ethanol in the mixture. Today, every major automobile manufacturer recommends the use of fuels containing as much as 10% ethanol by volume and fully warranties its use in all of their vehicles.
Bioethanol has been found to:
- Boost octane rating of gasoline. Ethanol is a very high-octane fuel (106), when ethanol is blended with gasoline, the octane rating of the gasoline goes up by three (3) points, without using harmful additives.
- Prevent premature detonation under load, due to ethanol’s high octane rating.
- Make burning complete and therefore reduce polluting emissions such as carbon monoxide, since adding ethanol to gasoline "oxygenates" the fuel
- Prevent burning of engine valves because ethanol burns cooler than gasoline.
- Burn cooler than gasoline, extending engine life
- Have a higher volumetric efficiency, contributing to increased power
Mythbusters For Car Owners
Based on an online information campaign by bioethanol proponents in the United States (www.ncga.com), the Philippine Fuel Ethanol Alliance presents the following clarifications to some myths regarding bioethanol use:
MYTH:
Ethanol causes “vapor lock.”
FACT: State and federal statutes continue to lower vapor pressure levels, virtually eliminating the vapor lock problems that were reported in the past. Additionally, all major auto manufacturers now use in-tank fuel pumps, which are not subject to vapor lock problems as were the older in-line fuel pumps.
MYTH:
Ethanol plugs up fuel lines and fuel injectors.
FACT: Situations involving plugged fuel filters are virtually non-existent today. In the past (especially in cars made prior to 1975), switching to ethanol-blended gasoline occasionally resulted in the fuel system being scrubbed clean due to the cleansing nature of ethanol. The loosened residue would be caught in the fuel filter—requiring a filter change. Once the filter was changed, the fuel system remained clean, enhancing engine performance.
Some components in gasoline, such as olefins (which are a waxy substance), can cause deposits that foul injectors. But since ethanol burns 100 percent and leaves no residue, it cannot contribute to the formation of deposits. In fact, ethanol blends help keep fuel injectors cleaner.
MYTH:
Most auto mechanics tell people not to use ethanol-blended gasoline.
FACT: A mechanic who says not to use E-10 Unleaded simply does not have correct information—particularly since every major automaker in the world approves the use of 10 blends ethanol blends under warranty. Fuel formulation and fuel quality have changed dramatically over the years, and many auto mechanics simply don’t have current information or knowledge of these changes and how they affect engine performance. The result: When a problem appears to be fuel related, some mechanics will immediately ask if E-10 Unleaded has been used—and if so, blame ethanol for the problem. In some states, E-10 Unleaded advocates have offered a substantial reward to any customer who can document damage from E-10 Unleaded to his or her car—and so far, no one has ever collected.
MYTH:
10% bioethanol-gasoline blends cannot be used in older cars.
FACT: The formulation of gasoline has changed considerably over the past few years without affecting the performance of older cars. Many older cars were designed to run on leaded gasoline, with the lead providing the octane necessary for engine performance. When lead was phased out of gasoline, oil companies added toxic chemicals to raise the octane rating and other additives to replace the “lubrication” value of lead.
Ethanol raises octane in gasoline by three points and it does so using a natural, renewable additive that works well in older engines.
Ethanol And Car Compatibility Information Sheet
Click here to download the information sheet
Refuting Carmakers’ Opposition To Ethanol
Click here to download the file
