pfi572
Active VIP Member
It says nothing about running premium in owners manual?
I do but sure isn't required.
I do but sure isn't required.
GM 1500's
- Thread starter sledsarecool
- Start date
loudmouth+coke
Active member
Cat401
Active VIP Member
i thought the 8 spd didn't come out till 2015? Even early 15's have the 6 spd...so i was told..... am i wrong?
pfi572
Active VIP Member
Recommend, not required .
Also mine is a 2014 with 6 speed trans.
Was going to go with 2015 but price increased with the 8 speed and different electronic controlled shocks.
Also mine is a 2014 with 6 speed trans.
Was going to go with 2015 but price increased with the 8 speed and different electronic controlled shocks.
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rsaruk
Active VIP Member
Is this just the 6.2? I better check the fuel door on my 2014 5.3. Never noticed this before.
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bingo1010
Active VIP Member
not sure about the chevy stuff, but the ford ecoboost gets noticably better economy with premium, cant really say anything about better power but the econmy increase pays for the extra cost of the premium. trouble with all the new computer controlled vehicles is you cant tell if they are taking timing out and detuning the engine due to lower octane fuel
MK4TDI
Active VIP Member
Recommended yes, I believe the same sticker/warning is on the fuel cap of an Etec too?
Everything I have read up on that 6.2 states with the 11.5:1 compression ratio the factory tune is built on 91/93 octane fuel. Yes it can compensate for a lower quality fuel much like the Etec, which in a pinch can get you were you need to go. But I wouldn't get in a regular habit of using regular in my sled, nor would I with that 6.2. Thats just my $.02 which led me to the 5.3 instead, which has a Blackbear tune for premium anyways...haha
As far as engines and transmission packages go. To my knowledge the 8spd wasn't available in 2014, with his being a Denali, it very well could be as they seem to always get special treatment vs most other trucks. I didn't investigate the Denali at all really cause I knew that wasn't a truck I would be buying. So for the regular Silverado's it goes: 2014 5.3 and 6.2 both got the 6spd, in 2015 the 5.3 still has the 6spd and any model with the 6.2 had the option for an 8sp, 6spd was standard. For the 2016's the upper end models with the 5.3 (SLT, LTZ, High Country, Denali) come with the 6spd standard still with the option for the 8spd. Any model with the 6.2 has the option again, the 6.2 High Country and Denali come standard with the 8spd.
Everything I have read up on that 6.2 states with the 11.5:1 compression ratio the factory tune is built on 91/93 octane fuel. Yes it can compensate for a lower quality fuel much like the Etec, which in a pinch can get you were you need to go. But I wouldn't get in a regular habit of using regular in my sled, nor would I with that 6.2. Thats just my $.02 which led me to the 5.3 instead, which has a Blackbear tune for premium anyways...haha
As far as engines and transmission packages go. To my knowledge the 8spd wasn't available in 2014, with his being a Denali, it very well could be as they seem to always get special treatment vs most other trucks. I didn't investigate the Denali at all really cause I knew that wasn't a truck I would be buying. So for the regular Silverado's it goes: 2014 5.3 and 6.2 both got the 6spd, in 2015 the 5.3 still has the 6spd and any model with the 6.2 had the option for an 8sp, 6spd was standard. For the 2016's the upper end models with the 5.3 (SLT, LTZ, High Country, Denali) come with the 6spd standard still with the option for the 8spd. Any model with the 6.2 has the option again, the 6.2 High Country and Denali come standard with the 8spd.
Cat401
Active VIP Member
I think you are bang on 100% right in terms of transmission availability
In terms of premium fuel.....I tend to disagree with the "need to burn Premium" crowd.
I have a 2011 6.2L with 276,000 kms......I have tried premium a few times and didn't feel/see any difference over regular in regard to performance or fuel economy. I changed the plugs and wires at about 250,000km and the old plugs were like new....
I run Petro Canada regular pretty much all the time. Is there something I am missing to the premium argument?
bingo1010
Active VIP Member
I run Petro Canada regular pretty much all the time. Is there something I am missing to the premium argument?
i used to doubt my brother with his ecoboost, until i bought one, i ran regular for the first8000 - 10000 km, then started using premium and noticed a jump in mileage, have since switched back and forth several times and always notice an increase in mileage. on average i would say a decrease of about 2L/100 km
not saying the chevs are the same, but i know it does affect the ecoboost, chances are if they recomend it then the engine will run better with it.......just saying
i used to doubt my brother with his ecoboost, until i bought one, i ran regular for the first8000 - 10000 km, then started using premium and noticed a jump in mileage, have since switched back and forth several times and always notice an increase in mileage. on average i would say a decrease of about 2L/100 km
not saying the chevs are the same, but i know it does affect the ecoboost, chances are if they recomend it then the engine will run better with it.......just saying
pfi572
Active VIP Member
Boost is way different .
It will improve with boost but not much if any on natural aspirated engine.
I run premium as my truck does seem to run better with it.
Advances timing and things I would guess.
It will improve with boost but not much if any on natural aspirated engine.
I run premium as my truck does seem to run better with it.
Advances timing and things I would guess.
tex78
Active VIP Member
Yes a boost will like premium fuel, with knock sensors going off less, more power comes
greenlightning86
Active member
If you are only driving down the highway I agree with you, there is no difference between running premium or regular. It feels the same and gets the same mileage. With my truck it is very noticeable when sitting at red lights and accelerating. At a red light on regular the rpm's jump around and the idle is noticeably rough but on premium the rpm is consistent. I have also noticed a slight difference on hard acceleration, the truck just feels a little sluggish on regular.
But like I said gas mileage is pretty much identical between the two, even when pulling a load.
pfi572
Active VIP Member
^^****
Find the exact same with mine.
Find the exact same with mine.
RoyalCargo
Member
I drive from the SS of Edmonton to Nisku everyday also. I bought a 2015 GMC with the 6.2 and an 8 speed, best truck I have ever owned, so far.
I run regular fuel and I'm consistently 11.9 L/100 on Hwy. Towing is another story lol. Buy it, you wont regret it !
I run regular fuel and I'm consistently 11.9 L/100 on Hwy. Towing is another story lol. Buy it, you wont regret it !
scrfce
Active VIP Member
If i had the chance again id do 6.2 no questions. The 5.3 is good and all but after driving my buds 6.2's i wish i wouldve been a bit more patient and waited for one.
Needed my pickup asap tho and there were no 6.2s readily available at the time
Needed my pickup asap tho and there were no 6.2s readily available at the time
I had a 2012 Denali 6.2 ,6 speed(130000km) and have a 2015 Denali 6.2, 8 speed with 7200km, not sold on the 8 speed just yet, needs different programming, shifting is weird at times. 8 speed will certainly be better for pulling loads. The 2015 doesnt seem to have the zip my 2012 had, maybe just needs more kms. Love them both! As for fuel I run regular most of the time, no problems yet.
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How does the mileage compare between the two?
Have had four 5.3, all in 1500's, and two 6.2, both in 2500's. Obviously the 6.2 is better for towing but the mileage when not is comparable to the 5.3, and in one particular truck (2012) was actually better. The 5.3 has a harder time with any amount of load and I sure wouldn't want to be pulling anything in the mountains with one. Have always used regular in them without any issues, and for oil changes always go by the computer - I use Mobil 1 full synthetic and usually get about 15,000 k between changes, and even then the colour is still good, and although we usually only keep them 3 years had 330k on one and it never used a drop of oil between changes. Currently have a 2014 1500 with a 5.3 and a 2015 2500 with the 6.2 - both are 6 speeds. Either way you should be fine, but if it's for towing definitely go with the 6.2.
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Cat401
Active VIP Member
Don't believe the 6.2 was ever in the 2500.....only available as an option in the 1500's..........perhaps you are thinking the 6.0L?
kovs
Active VIP Member
Definately no 6.2L in the 2500 or I would own one
For 15 and up soon as you go to 6.2L you get the 8sp
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For 15 and up soon as you go to 6.2L you get the 8sp
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