Premium fuel denali 2015

[bearsdenali]

You may be correct, haven't driven the Denali in hot weather but in my 2011 6.2 Sierra there is a large difference.

 

[Cmicasa the Great XvX]

Wiating for a full tank of 87 is gone and then I'm switching to my Intune 93 Octane Tune at least while it is under $3.00 per gallon. Stars hitting $4 again and I may switch back to 87

 

[JennaBear]

You may be correct, haven't driven the Denali in hot weather but in my 2011 6.2 Sierra there is a large difference.

A difference in air density, but it will ping no matter what the temperature, on 87.

 

[bearsdenali]

Never heard a ping.

 

[scryfst]

Never heard a ping.

Probably not,... that's what knock sensors are for.



Octane ratings are essentially the resistance of a fuel to pre-ignition. The higher the octane rating, the greater the fuel’s resistance to knocking or pinging (pre-ignition). If a engine has a high compression ratio, uses FI etc..., you probably should be using a high octane fuel.


Run low-octane fuel in a engine that should run high-octane fuel and the effects can range from minimal to disastrous. When the ecm in your 6.2 detects pre-ignition it makes adjustments at the expense of power and economy. Take away the computer and pre-ignition can literally destroy a motor.

I'll never understand how someone can afford the payment associated with one of these trucks and then feel the need to save the cost of a cup of coffee from Starbucks during a fill-up?!