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  #1  
Old 02-25-2020, 11:43 AM
egladding egladding is offline
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Default New Silverado with 6.2L

Folks,
I am looking to upgrade my Silverado. The one I am looking at has the max trailering package and the 6.2l V8 which I like. I am getting mixed information on fuel requirements. Some say it will run fine on 87, others say it needs premium. I will obviously ask the dealer when I go to be sure but what do the WC gurus say?
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Old 02-25-2020, 01:18 PM
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jdino jdino is offline
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I just ordered one myself. Read afterwards that the 6.2 takes premium gas. Can not verify though.
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Old 02-25-2020, 01:24 PM
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RMBin303 RMBin303 is online now
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I had an 11. It had a sticker near the gas fill that said Premium Required.

But there is no way Id buy one with the 5.3. The 6.2 is a much better engine even if premium is required.


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Old 02-25-2020, 04:28 PM
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Minnie Man Minnie Man is offline
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I have an 18' with the 6.2. I run 87 when driving and 92 towing. Pretty sure that is what my book said to do.

Love that engine.

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  #5  
Old 02-25-2020, 05:45 PM
sdwalleye621 sdwalleye621 is offline
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I have a 2018 GMC 1500 with the 6.2, I run 10% ethanol with no issues.

Side note I am looking at trading for a 2020 silverado and was told the 19 and 20 6.2l v8s dont get the mileage the 17 and 18 6.2's get? Not sure I believe that but thought I would share. Im considering the new 3.0l duramax.
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Old 02-25-2020, 07:26 PM
REW REW is offline
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SD,
You should be able to look up user reviews of the vehicles in question to find real world on the road mileage figures.
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Old 02-25-2020, 08:20 PM
thawk9455 thawk9455 is offline
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Chevy posts the owners manual online. See page 279.

https://my.chevrolet.com/content/dam...ers-manual.pdf

I read it as you "can" use 87 but we really don't recommend it. Having a vehicle with similar wording now, it would significantly reduce my desire to consider the 6.2L if I look at a Tahoe to replace my current vehicle. Probably would have only gotten the 5.3L anyway but that adds another reason.
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Old 02-25-2020, 09:00 PM
clawman clawman is offline
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Default premium

I had a '15 GMC with the 6.2l V8 and now have a '17 of the same truck. I have never put anything other than 87 octane in either. Collectively over 100k miles. I'm not saying it is right but when I get a new '20 model truck I will continue to run 87 octane.
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Old 02-26-2020, 05:08 AM
Slim03 Slim03 is offline
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I have a 2016 Yukon with the 6.2 and run 10% ethanol in it all the time. On a long trip I filled with 92 just to check and I got 3 mpg worse under the same driving conditions. I just bought a 2019 Silverado with a 6.2 in November and only run 10% ethanol in it as well. So far my mileage isn’t great. Average over 8000 miles is only 16.5 with quite a bit of highway miles. Hoping it improves as I get more miles on the truck. Still wouldn’t change the power though and go back to the 5.3.
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Old 02-28-2020, 01:06 PM
egladding egladding is offline
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I pulled the trigger yesterday. Right inside the fuel door it says premium fuel is recommended. It does not say required. I would think if you want to actually hit the mpg and HP ratings premium fuel would be required. The 6.2L is actually rated 1mpg less than the 5.3l.
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