Tune for Regular Gas

[RVAHokie]

Small engines can take more ethanol but most should use Ethanol free when available. Issue comes with engines that sit idle for long periods of time and that high ethanol fuel sits in the fuel lines. Eventually the fuel lines corrode away.

Happens all the time in small power tools (generators, mowers, lawn machines, as well as boats). Should always try to use ethanol free if you can find it.

 

[swathdiver]

Small engines can take more ethanol but most should use Ethanol free when available. Issue comes with engines that sit idle for long periods of time and that high ethanol fuel sits in the fuel lines. Eventually the fuel lines corrode away.

Happens all the time in small power tools (generators, mowers, lawn machines, as well as boats). Should always try to use ethanol free if you can find it.

Doesn't happen in the aforementioned automobiles produced since 2001.

@mb1500 I have a challenge for you. Run three tanks of E15 if your engine doesn't require 91+ and note the gas mileage, then three more on E10 and post up the results.

 

[mb1500]

Doesn't happen in the aforementioned automobiles produced since 2001.

@mb1500 I have a challenge for you. Run three tanks of E15 if your engine doesn't require 91+ and note the gas mileage, then three more on E10 and post up the results.

Sorry, don’t have E15 around here.

If we assume everyone’s 2001 and newer PCM can properly adjust based on O2 feedback than the figure is roughly 1.65% more fuel consumption going from E10 to E15.

Too many factors driving in the real world for anyone to make a meaningful comparison but here’s the point.
Our 4 week average in the US for 06/03/22 was 9 million barrels per day. Change the national supply to E15 from E10 overnight, hold real demand constant, and that number goes to 9.1485, an increase of 148,000 barrels per day for nothing.

 

[m1949]

With these soaring gas prices is GM willing to provide a tune for regular gas vs premium on 6.2L models?!? Let's go GM, hook us up!!

I plan to try Ristone Octane booster. At $2.56 a bottle per 20gal, adding it to regular gas is considerably less expensive than 20 gals of premium.

 

[m1949]

AltI plan to try octane booster. The second best selling booster on Amazon sells for $2.56 to treat 20 gals of gas. If it meeets the makers claims I will save several dollars per tank full Given the difference in price per gallon between regular and premium gas.

 

[DarkHorizon]

If that octane booster works as good as advertised it will only boost you from midgrade to premium, not regular to premium. Around here that is about 20 cents a gallon so i'm not sure its worth the trouble/risk to save like $30 a year.

 

[swathdiver]

Sorry, don’t have E15 around here.

If we assume everyone’s 2001 and newer PCM can properly adjust based on O2 feedback than the figure is roughly 1.65% more fuel consumption going from E10 to E15.

Too many factors driving in the real world for anyone to make a meaningful comparison but here’s the point.
Our 4 week average in the US for 06/03/22 was 9 million barrels per day. Change the national supply to E15 from E10 overnight, hold real demand constant, and that number goes to 9.1485, an increase of 148,000 barrels per day for nothing.

I have made a meaningful comparison, over the course of 4 years and documented it.

Not just the PCM, the fuel systems since 2001 are also made to handle E15. I am also not in favor of it being forced on the populace it should stand or fail on its own.

 

[BMPNUGLS]

The real problem with E10-E15 is it absorbs water - in particular if the vehicle sits for any length of time and temperature varies.

Being highly hygroscopic, ethanol will enable whatever fuel it's blended with to absorb more water. Water in fuel is rarely a good thing, and causes a number of problems for the equipment that uses that fuel. One big problem is a tendency that is called phase separation, which relates to the fact that an E10 or E15 ethanol blend can only absorb so much water.​

If the ethanol fuel absorbs ulls too much water, phase separation occurs - the ethanol comes out of solution with the gasoline. Essentially, the mixture breaks apart. When this happens, it destroys the quality of that gasoline and strips away a good amount of the octane rating of that fuel. You end up with poor quality gasoline and a layer of water and gasoline in the bottom of your fuel tank that can damage your engine if it’s sucked up into the combustion chamber by your fuel line.

 

[Banks22]

The real problem with E10-E15 is it absorbs water - in particular if the vehicle sits for any length of time and temperature varies.

Being highly hygroscopic, ethanol will enable whatever fuel it's blended with to absorb more water. Water in fuel is rarely a good thing, and causes a number of problems for the equipment that uses that fuel. One big problem is a tendency that is called phase separation, which relates to the fact that an E10 or E15 ethanol blend can only absorb so much water.​

If the ethanol fuel absorbs ulls too much water, phase separation occurs - the ethanol comes out of solution with the gasoline. Essentially, the mixture breaks apart. When this happens, it destroys the quality of that gasoline and strips away a good amount of the octane rating of that fuel. You end up with poor quality gasoline and a layer of water and gasoline in the bottom of your fuel tank that can damage your engine if it’s sucked up into the combustion chamber by your fuel line.

Its as if they’re trying to destroy the ICE vehicles.....

 

[avalonandl]

I suggest a mast and a sail….