โMar-27-2015 06:59 AM
โApr-08-2015 09:44 PM
Mike Up wrote:BenK wrote:
Ditto that it is NOT designed for +8K GVWR usage...ditto reading that discussion
and wished I'd kept a copy as can't find it now
Why it is only available on lower class trucks
It is a fantastic 'car' engine though and another why it is available on the
lesser class trucks...AKA 1500's...AKA half ton
Same or similar to why 'P' class tires are NOT offered on +8K GVWR trucks. They
are designed for 'cars' or 'passenger cars'
Think this is the correct one for the OP's half ton SUV
GMLS866.2L L86 6.2L
Wow, I thought the curve would be much better than the Ford 6.2L. BUT the Ford with lower max torque and a higher peak rpm, still has has about the same torque down in the lower rpms.
โApr-08-2015 07:16 PM
โApr-07-2015 03:29 PM
BenK wrote:
Ditto that it is NOT designed for +8K GVWR usage...ditto reading that discussion
and wished I'd kept a copy as can't find it now
Why it is only available on lower class trucks
It is a fantastic 'car' engine though and another why it is available on the
lesser class trucks...AKA 1500's...AKA half ton
Same or similar to why 'P' class tires are NOT offered on +8K GVWR trucks. They
are designed for 'cars' or 'passenger cars'
Think this is the correct one for the OP's half ton SUV
GMLS866.2L L86 6.2L
โMar-29-2015 07:35 AM
gmcsmoke wrote:Well "maybe" my irrelevant information might help the OP in his quest for a truck that meets HIS needs more than yours. You failed to mention that the current crop of DI engines have fuel management and that there have been a multitude of problems with the system, where as MY old dilapidated truck has NO fuel management and has never hiccupped while driving with a heavy load in the mountains. Just a little info for him to think about.The Texan wrote:
My owners manual and the 2012 manual BOTH say premium is "recommended" but regular may be used. Then it goes into the fact that at altitudes above a certain point, mid grade fuel is recommended and again, regular may be used. The fact that I live at 5K' and 91 octane is NOT sold and I use NON-ethanol fuel, I guess I am going to grenade my engine .... NOT.
The OP is looking at a DI 6.2 engine not a 3 year old truck like yours. I posted relevant info to the engine we're discussing not yours, nobody cares what octane your engine runs.
The fact is GM's new line of high compression DI engines require high octane in certain models, perhaps if you read the link I posted I wouldn't have to repeat myself.
Bob & Betsy - USN Aviation Ret'd '78 & LEO Ret'd '03 & "Oath Keeper Forever"
โMar-29-2015 05:17 AM
The Texan wrote:
My owners manual and the 2012 manual BOTH say premium is "recommended" but regular may be used. Then it goes into the fact that at altitudes above a certain point, mid grade fuel is recommended and again, regular may be used. The fact that I live at 5K' and 91 octane is NOT sold and I use NON-ethanol fuel, I guess I am going to grenade my engine .... NOT.
โMar-28-2015 05:59 PM
โMar-28-2015 02:17 PM
โMar-28-2015 01:52 PM
gmcsmoke wrote:My owners manual and the 2012 manual BOTH say premium is "recommended" but regular may be used. Then it goes into the fact that at altitudes above a certain point, mid grade fuel is recommended and again, regular may be used. The fact that I live at 5K' and 91 octane is NOT sold and I use NON-ethanol fuel, I guess I am going to grenade my engine .... NOT.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.
http://www.chevrolet.com/owners/chevy-manuals.html
Bob & Betsy - USN Aviation Ret'd '78 & LEO Ret'd '03 & "Oath Keeper Forever"
โMar-28-2015 01:49 PM
gmcsmoke wrote:BenK wrote:
Ditto that it is NOT designed for +8K GVWR usage...ditto reading that discussion
and wished I'd kept a copy as can't find it now
Why it is only available on lower class trucks
It is a fantastic 'car' engine though and another why it is available on the
lesser class trucks...AKA 1500's...AKA half ton
Same or similar to why 'P' class tires are NOT offered on +8K GVWR trucks. They
are designed for 'cars' or 'passenger cars'
Think this is the correct one for the OP's half ton SUV
GMLS866.2L L86 6.2L
I wouldn't post a hp/tq curve for a 6.2L and say that's the reason it's not in a HD truck because I can post the exact same hp/tq curve for a 6.0L making peak HP and tq at those RPM's.
โMar-28-2015 01:40 PM
BenK wrote:
Ditto that it is NOT designed for +8K GVWR usage...ditto reading that discussion
and wished I'd kept a copy as can't find it now
Why it is only available on lower class trucks
It is a fantastic 'car' engine though and another why it is available on the
lesser class trucks...AKA 1500's...AKA half ton
Same or similar to why 'P' class tires are NOT offered on +8K GVWR trucks. They
are designed for 'cars' or 'passenger cars'
Think this is the correct one for the OP's half ton SUV
GMLS866.2L L86 6.2L
โMar-28-2015 01:36 PM
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.
โMar-27-2015 06:38 PM
โMar-27-2015 05:54 PM
โMar-27-2015 05:45 PM