E85 and 91 octane blending
05-30-17, 09:12 PM
#16
Well don't trust what you read, very few industry professionals know ANYTHING. Ethanol will clean out deposits left by regular gasahol or gasoline. Easier on the engine overall. No issues on cars past 2001. The crap I hear from "industry pros" is frightening.
I would stay away from those additives you are using. Why you would add ATF fluid is beyond me, the things I hear from people are scary.
Synthetic oil back in the day used to blow engines because they didn't use the proper EP and AW additives in the oil chemistry. Ethanol was the similar way, today's ethanol is fine. Of course your car runs better on higher octane fuel, doesn't mean it loves it. Gasoline is very hot compared to ethanol. The engine would run better on ethanol and run longer. You should not have "stiction" on an RC-F.
@Punished RC-F, that is too much ethanol for this car. stick to 13.5 gallons of 93 and 1 gallon of E85, unless you can verify the ethanol percentage in your flex fuel and then do the math. Overloading the fuel system on this RC-F will destroy it and crap out your combustion dynamic.
I would stay away from those additives you are using. Why you would add ATF fluid is beyond me, the things I hear from people are scary.
Synthetic oil back in the day used to blow engines because they didn't use the proper EP and AW additives in the oil chemistry. Ethanol was the similar way, today's ethanol is fine. Of course your car runs better on higher octane fuel, doesn't mean it loves it. Gasoline is very hot compared to ethanol. The engine would run better on ethanol and run longer. You should not have "stiction" on an RC-F.
@Punished RC-F, that is too much ethanol for this car. stick to 13.5 gallons of 93 and 1 gallon of E85, unless you can verify the ethanol percentage in your flex fuel and then do the math. Overloading the fuel system on this RC-F will destroy it and crap out your combustion dynamic.
05-31-17, 06:55 PM
#17
Lead Lap
Thread Starter
Well don't trust what you read, very few industry professionals know ANYTHING. Ethanol will clean out deposits left by regular gasahol or gasoline. Easier on the engine overall. No issues on cars past 2001. The crap I hear from "industry pros" is frightening.
I would stay away from those additives you are using. Why you would add ATF fluid is beyond me, the things I hear from people are scary.
Synthetic oil back in the day used to blow engines because they didn't use the proper EP and AW additives in the oil chemistry. Ethanol was the similar way, today's ethanol is fine. Of course your car runs better on higher octane fuel, doesn't mean it loves it. Gasoline is very hot compared to ethanol. The engine would run better on ethanol and run longer. You should not have "stiction" on an RC-F.
@Punished RC-F, that is too much ethanol for this car. stick to 13.5 gallons of 93 and 1 gallon of E85, unless you can verify the ethanol percentage in your flex fuel and then do the math. Overloading the fuel system on this RC-F will destroy it and crap out your combustion dynamic.
I would stay away from those additives you are using. Why you would add ATF fluid is beyond me, the things I hear from people are scary.
Synthetic oil back in the day used to blow engines because they didn't use the proper EP and AW additives in the oil chemistry. Ethanol was the similar way, today's ethanol is fine. Of course your car runs better on higher octane fuel, doesn't mean it loves it. Gasoline is very hot compared to ethanol. The engine would run better on ethanol and run longer. You should not have "stiction" on an RC-F.
@Punished RC-F, that is too much ethanol for this car. stick to 13.5 gallons of 93 and 1 gallon of E85, unless you can verify the ethanol percentage in your flex fuel and then do the math. Overloading the fuel system on this RC-F will destroy it and crap out your combustion dynamic.
02-21-21, 07:33 PM
#20
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Get the E85 app
02-22-21, 08:55 AM
#21
Holy thread revival.
I tried a 3 gallon E85 blend on a full tank of gas once. About the only thing I noticed was that it leaned out my AFRs a bit. Since these cars aren't flex fuel, they would typically need a tune to account for the properties of E85. Basically it needs more fuel and power comes from advanced timing. Since ethanol has less energy than gasoline, using it without any ECU calibration just means you're running lean and down on power.
Since I only experimented with one tank, I'm open to the idea that the Lexus ECU may eventually make fuel trim adjustments and advance timing on it's own after a while. Just doubt it's enough to really compensate for a fuel it wasn't calibrated for.
Tune or bust, imo
I tried a 3 gallon E85 blend on a full tank of gas once. About the only thing I noticed was that it leaned out my AFRs a bit. Since these cars aren't flex fuel, they would typically need a tune to account for the properties of E85. Basically it needs more fuel and power comes from advanced timing. Since ethanol has less energy than gasoline, using it without any ECU calibration just means you're running lean and down on power.
Since I only experimented with one tank, I'm open to the idea that the Lexus ECU may eventually make fuel trim adjustments and advance timing on it's own after a while. Just doubt it's enough to really compensate for a fuel it wasn't calibrated for.
Tune or bust, imo
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