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Old 05-30-2016, 01:59 PM   #16
ac_2007
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Quote:
Originally Posted by jabela View Post

It's been a while since I've run 87 in my E46, but it was certainly down on power and running a bit rough.
I wonder if you had less issues with Petro 87 due to higher ethanol content? ie. higher knock resistance.
If it had higher knock resistance, wouldn't the octane rating reflect that?

I had to put Shell 87 the other day when I was on empty, and the station was out of V-Power. Car still is hesitating on WOT, and idle feels a little rough.

If it was Petro 87, the car would just feel a tad down on power, that's about it.
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Old 05-30-2016, 05:41 PM   #17
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If it had higher knock resistance, wouldn't the octane rating reflect that?

I had to put Shell 87 the other day when I was on empty, and the station was out of V-Power. Car still is hesitating on WOT, and idle feels a little rough.

If it was Petro 87, the car would just feel a tad down on power, that's about it.
True about the octane but it could be because ethanol burns cooler it would mean that E10 is less likely to produce knock than pure gas.

You could probably fix the issues with the 87 gas in your tank by adding some octane booster from Canadian Tire or wherever.
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Old 05-30-2016, 10:44 PM   #18
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Here is a reply from Canadian Tire per ethanol in there fuels

Thank you for contacting our office regarding the quality of our fuel. We have up to 10% ethanol in regular and mid-grade fuel, there is no ethanol in premium fuel. This applies to all our Canadian Tire Gas Bars.
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Old 05-30-2016, 11:07 PM   #19
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I found this on a fishing forum...outboard motors etc...



Here is a reply from Canadian Tire per ethanol in there fuels

Thank you for contacting our office regarding the quality of our fuel. We have up to 10% ethanol in regular and mid-grade fuel, there is no ethanol in premium fuel. This applies to all our Canadian Tire Gas Bars.
Cool. Makes sense that they use Shell gasoline considering their Motorcraft oil is from Shell.
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Old 05-31-2016, 01:41 AM   #20
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use your trip odo to check if you get better fuel mileage with or without ethanol, i have/do. more fuel efficient, not more power. ethanol has an octane rating of 113, so it would increase the knock resistance of any fuel it is added to.
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Old 05-31-2016, 08:11 AM   #21
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Old 05-31-2016, 10:08 AM   #22
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Old 05-31-2016, 10:40 AM   #23
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use your trip odo to check if you get better fuel mileage with or without ethanol, i have/do. more fuel efficient, not more power. ethanol has an octane rating of 113, so it would increase the knock resistance of any fuel it is added to.
Everyone should get reduced MPG with ethanol content. It has 30% less power density (so requires 30% more fuel to get same power).
Octane is the same as the rating on the pump accounts for the ethanol content (ethanol added instead of other octane boosters).

Ethanol contains about one-third less energy than gasoline. So, vehicles will typically go 3% to 4% fewer miles per gallon on E10 than on 100% gasoline
https://www.fueleconomy.gov/feg/ethanol.shtml
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