Is premium gas worth it in a 991?
12-20-2017, 01:33 PM
#31
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Remember the days when gas used to have a $0.10 spread among octane levels? Those days are l o n g gone. Now it's about $0.40-$0.50 spread between grades in my driving area.
Years ago when I tested ethanol levels in gas (very easy test using dye and water displacement in a graduated cylinder) most all gas was below 10% (to meet the labeling laws) and the bulk I saw was in the 7-8% range.
Years ago when I tested ethanol levels in gas (very easy test using dye and water displacement in a graduated cylinder) most all gas was below 10% (to meet the labeling laws) and the bulk I saw was in the 7-8% range.
12-20-2017, 01:39 PM
#32
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Remember the days when gas used to have a $0.10 spread among octane levels? Those days are l o n g gone. Now it's about $0.40-$0.50 spread between grades in my driving area.
Years ago when I tested ethanol levels in gas (very easy test using dye and water displacement in a graduated cylinder) most all gas was below 10% (to meet the labeling laws) and the bulk I saw was in the 7-8% range.
Years ago when I tested ethanol levels in gas (very easy test using dye and water displacement in a graduated cylinder) most all gas was below 10% (to meet the labeling laws) and the bulk I saw was in the 7-8% range.
12-20-2017, 05:37 PM
#33
I put a Steve Wong chip in my ‘86 Targa to optimize the afr and timing for 93 octane and it did seem to brighten up the engine response.
Back in the day all P-cars were designed to work on lower grade gasoline, due to limited high grade availability. Today with computers and sensors galore, I think the cars will self adjust to the fuel properties.