GM 6.2 Liter
I'm considering ordering a new GMC Sierra 1500 with the max tow package. It would be a crew cab short box SLT trim. I can either get the 5.3 or the 6.2 liter. Both have the 8 speed transmission. I...
Forum Discussion
Dadoffourgirls wrote:
From the 2017 Manual:
For the 6.2L engine, premium
unleaded gasoline meeting ASTM
specification D4814 with a posted
octane rating of 93 is highly
recommended for best performance
and fuel economy. Unleaded
gasoline with an octane rated as low
as 87 can be used. Using unleaded
gasoline rated below 93 octane,
however, will lead to reduced
acceleration and fuel economy.
If knocking occurs, use a gasoline
rated at 93 octane as soon as
possible, otherwise, the engine
could be damaged. If heavy
knocking is heard when using
gasoline with a 93 octane rating, the
engine needs service.
Is this straight from the GM owners manual? Where did you find this if you don't have a 2017 with the 6.2. I appreciate you posting it.
