CK5
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Jury is still out on my 2017 GMC. Seems to run a little better, but that could just as easily be bullshit too. Trip computer says 15.7 mpg over the last 45 miles.
 
Jury is still out on my 2017 GMC. Seems to run a little better, but that could just as easily be bullshit too. Trip computer says 15.7 mpg over the last 45 miles.
The conversation we had after it’s recent dealer excursion was interesting
 
The one thing the higher octane fuels do have, is more cleaners in them.. I run them in the car occasionally anyhow just to make sure the engine/injectors ect dont get a ton of buildup.
 
Jury is still out on my 2017 GMC. Seems to run a little better, but that could just as easily be bullshit too. Trip computer says 15.7 mpg over the last 45 miles.

I don't see any significant change in my 2018. GM "recommends" premium, but unless I am towing in hot weather it runs great on 87. 16-18 in town and 21-23 on the highway. I have a best 50 mile average of 27 using regular.
 
I enjoyed being able to just drive it today

Starting to pull at about 2200 now. That nice cackling sound from the mufflers has returned. I guessing due to being close on the AFR
sooooo this means your happy with it and its better each time ...... or i should sell mine before install ?
 
Started the truck last night, 8* F

It didn’t light the first go, but tried. Hit right off the second. Didn’t need to hold the pedal or anything
What...no cold start video? Did we move past that trend with the new year now? :thumb: Glad it's going better with this system.
 

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