jorgetoro
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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!!
Tune for Regular Gas
- Thread starter jorgetoro
- Start date
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Snowbound
Jim
With the higher compression engines, you shouldn’t run the lower octane fuel. Tuning isn’t the issue, you will have spark knock and it will pull timing which will give you reduced power and worse fuel consumption. Best you can do is keep tires inflated to spec, remove any unnecessary weight, coast to stops more and lighter throttle on acceleration.
This fuel situation is getting ridiculous. They just want everyone to buy EVs. It’s hurting everyone. I can’t believe I’m paying $5.49 for diesel! If this weather ever breaks I’ll be spending more time on 2 wheels.
This fuel situation is getting ridiculous. They just want everyone to buy EVs. It’s hurting everyone. I can’t believe I’m paying $5.49 for diesel! If this weather ever breaks I’ll be spending more time on 2 wheels.
Regarding tuning: This gen ECU is double encrypted and only one company has been able to tune a single ECU (Corvette) b/c the encryption is not a single-solution-works-for-all-vehicles scenario. Also, I don't see GM ever providing this service.
Regarding your desire to run non-premium fuel for lower fuel cost per gallon: My understanding is the ECU will figure out you are not running 93 and retard the valve timing accordingly to avoid pre-combustion and knock. Result is lower HP and a tiny but lower fuel economy, and supposedly GM wouldn't call this "negligence" in a warranty situation b/c 93 is recommended vs required. I could be totally wrong on this...
Regarding your desire to run non-premium fuel for lower fuel cost per gallon: My understanding is the ECU will figure out you are not running 93 and retard the valve timing accordingly to avoid pre-combustion and knock. Result is lower HP and a tiny but lower fuel economy, and supposedly GM wouldn't call this "negligence" in a warranty situation b/c 93 is recommended vs required. I could be totally wrong on this...
Blueinterceptor
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Haven’t the new 6.2’a been programmed for 91 now?
Quark
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Some here or were here expressed that people buying these vehicles aren't concerned with the price of gas. Not sure why they thought that maybe they were bored sales associates.
swathdiver
Full Access Member
After many thousands of miles of abuse burning low octane fuel, at some point the pistons and rings will give way.
It would be nice if there was a sensor to detect the octane level of the fuel and then run the appropriate tables like Dodge and Toyota. Constantly pulling timing eventually results in broken parts.
Not to anyone in particular: You bought a high performance vehicle, enjoy it for what it is and take care of it.
it does exactly that... smh. Has done dual fuel maps like this for years on the 6.2. 87 is still not the 'recommended fuel'
swathdiver
Full Access Member
Please elaborate. The Gen IV has high and low tables with regards to ethanol content as did some or most of the Gen V LT engines used in the K2s, not sure about the engines in the T1s.
Lots of manufacturers stating 10%MAX, not sure how that’s going to work out with the non-flex fuel vehicles out there.
More ethanol in the mix, everyone gets a little less MPG. Back to the pump quicker and more consumption.
More ethanol in the mix, everyone gets a little less MPG. Back to the pump quicker and more consumption.
DarkHorizon
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The price of Premium is a fixed price, unrelated to gas prices. If you can afford premium with low gas prices you can afford it with high gas prices.
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.
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
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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.
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.
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
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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
Full Access Member
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.
The real problem with E10-E15 is it absorbs water - in particular if the vehicle sits for any length of time and temperature varies.
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.
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
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I suggest a mast and a sail….
