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<p dir="auto">A few points to mention here from Han's post -</p>
<div dir="auto">The octane rating in North America is calculated
differently than Europe where the North American values are
typically about 6 points lower. so Han's 98 is around 92 here in
the USA. Depending on local petrol stations, I use 91 or 92
premium. Octane requirements vary due to elevation so in higher
elevation (mountainous) regions of the USA, premium is typically
89.</div>
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<div dir="auto">Ethanol is a lower btu value fuel so mpg will be
less. Ethanol has about 30% less energy. During my high mileage
driving days using gasohol, I saw about a 1 mpg reduction, a little more than
what the math would indicate.</div>
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<div dir="auto">A response to Max -</div>
<div dir="auto">I agree about ethanol. I have been using E10 in my
cars almost exclusively for the last two decades. I did have a
premature failure of the gas hose between the SU carbs in my 67BGT
about 15 years ago that was likely caused by the gas formulation.
More recently, I replaced the fuel sender in my 64B and the
plastic float absorbed fuel within a few weeks, also likely due to
ethanol. However, Moss sells the original style brass float as a
replacement. Those have been my only issues. New rubber components
are likely to be ethanol resistant.<br>
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<div dir="auto">The main issue with E10 is that it absorbs moisture
and in time can undergo phase separation where water can
accumulate in the fuel tank. However, that involves being in a
humid climate and significant time to allow the alcohol to absorb
the moisture to its saturation point and then having the alcohol
evaporate, leaving behind the water. If you drive your car
frequently and routinely gas up or do not live in a coastal or
lake area, there should be no problems with gasohol.</div>
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<div dir="auto">There is a premium cost for straight premium gas -
in Idaho it is about 30 cents a gallon more expensive and can be
hard to find. But I have found it readily available in boating
communities.</div>
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<div dir="auto">Another point -</div>
<div dir="auto">Gasoline does not absorb water as readily as gasohol. If you live
in very cold climates where condensation is
common, water can and will settle in your tank. When I lived in
the extremely cold climate of Montana in the 80s when gasohol was
not available, I experienced gas line freeze ups. We had to keep
our tanks full to avoid humid air and had to add gas-line antifreeze ("Heet" aka methanol, 12 oz per tank) to avoid this. With
gasohol, that is no longer an issue.<br>
</div><div dir="auto"><br></div><div dir="auto">David Councill </div><div dir="auto">64B </div><div dir="auto">67BGT </div><div dir="auto">72B</div><div dir="auto"><br></div><div dir="auto"><br></div>
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