Re: Gasoline?
All fuels will probably have a small amount of some type of alcohol additive acting as an anti-icing agent. The larger 10% alcohol (ethanol) fuels, sometimes known as oxygenated fuels or gasohol, can damage some of the older engines. <br /><br />You might find this of interest....<br /><br />"Material Compatibility: Some fuel system metal components will rust or corrode in the presence of water or acidic compounds. The additional water dissolved in oxygenated gasolines does not cause rusting or corrosion, but water from the phase separation of gasoline oxygenated with ethanol will, given time.<br /><br />Oxygenates can swell and soften natural and some synthetic rubbers (elastomers). Oxygenated gasolines affect elastomers less; the extent of which also depends on the hydrocarbon chemistry of the gasoline, particularly the aromatics content. The effect is of potential concern because fuel systems contain elastomers in hoses, connectors ('O'-rings), valves and diaphragms. The elastomeric materials used in today's vehicles have been selected to be compatible with oxygenated gasolines. Owners manuals approve the use of gasoline oxygenated with 10% ethanol or 15% MTBE. (The compatibility of the other ethers is the same as that of MTBE.)<br /><br />Automobile manufacturers upgraded their fuel system elastomers at different times. Elastomers in pre-1975 vehicles may be sensitive to oxygenated and high-aromatics gasolines. Elastomers in 1975 to 1980 vehicles were upgraded, but not to the same extent as in later models.1 Chevron's experience is that there is not a significant compatibility problem between oxygenated gasolines and elastomers in older cars. There was not an increase in problems when oxygenated gasoline was introduced in 39 metropolitan areas in the winter of 1992. This held true for the western states, which tend to have more older cars in their vehicle populations and for areas where different oxygenates were used (MTBE throughout California; ethanol in Portland, Oregon and Seattle/Tacoma, Washington."
All fuels will probably have a small amount of some type of alcohol additive acting as an anti-icing agent. The larger 10% alcohol (ethanol) fuels, sometimes known as oxygenated fuels or gasohol, can damage some of the older engines. <br /><br />You might find this of interest....<br /><br />"Material Compatibility: Some fuel system metal components will rust or corrode in the presence of water or acidic compounds. The additional water dissolved in oxygenated gasolines does not cause rusting or corrosion, but water from the phase separation of gasoline oxygenated with ethanol will, given time.<br /><br />Oxygenates can swell and soften natural and some synthetic rubbers (elastomers). Oxygenated gasolines affect elastomers less; the extent of which also depends on the hydrocarbon chemistry of the gasoline, particularly the aromatics content. The effect is of potential concern because fuel systems contain elastomers in hoses, connectors ('O'-rings), valves and diaphragms. The elastomeric materials used in today's vehicles have been selected to be compatible with oxygenated gasolines. Owners manuals approve the use of gasoline oxygenated with 10% ethanol or 15% MTBE. (The compatibility of the other ethers is the same as that of MTBE.)<br /><br />Automobile manufacturers upgraded their fuel system elastomers at different times. Elastomers in pre-1975 vehicles may be sensitive to oxygenated and high-aromatics gasolines. Elastomers in 1975 to 1980 vehicles were upgraded, but not to the same extent as in later models.1 Chevron's experience is that there is not a significant compatibility problem between oxygenated gasolines and elastomers in older cars. There was not an increase in problems when oxygenated gasoline was introduced in 39 metropolitan areas in the winter of 1992. This held true for the western states, which tend to have more older cars in their vehicle populations and for areas where different oxygenates were used (MTBE throughout California; ethanol in Portland, Oregon and Seattle/Tacoma, Washington."
