The Texan wrote:gmcsmoke wrote:Please show me where the word requires is published in ANY GM publication. I know for a fact it is NOT in the 2011 or 2012 owners manual.
if you think a 1500 with a 420HP motor that gets a EPA estimate of 14/20 and requires premium gas is going to be leaps and bounds above a 360HP 2500 6.0L in gas mileage you got another thing coming.
For all vehicles except those with
the 6.2L V8 engine, use regular
unleaded gasoline meeting ASTM
specification D4814 with a posted
octane rating of 87 or higher. Do not
use gasoline with an octane rating
below 87, as it may cause engine
damage and will lower fuel
economy.
If the vehicle has the 6.2L V8 engine
(VIN Code J), use premium
unleaded gasoline meeting ASTM
specification D4814 with a posted
octane rating of 91 or higher.
