Tune for Regular Gas

[jorgetoro]

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!!

 

[Snowbound]

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.

 

[Tyrell]

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...

 

[Blueinterceptor]

Haven’t the new 6.2’a been programmed for 91 now?

 

[Quark]

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]

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...

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.

 

[Toasty]

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]

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'

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.

 

[mb1500]

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.

 

[DarkHorizon]

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.