 |
|
09-08-2010, 07:29 PM
|
|
Hummer Veteran
|
|
Join Date: Jul 2005
Posts: 80
|
|
Re: premium unleaded
Quote:
|
Originally Posted by HUMTECH
The higher octane in premium fuel only raises the fuels resistance to burn which is why higher compression engines require higher octane. The higher octane value will decrease the chances of preignition(detonation) adds no advantages to A lower compression engine
|
The Hummer tech in Utah said the same thing. I run 85 octane and my H2 runs great. He also said 85 octane is recommended in the higher elevations. 
__________________
2005 Black LUX
37x13.50R17 Toyo MT
Torsion keys. 2" rear coil spacers
2" wheel spacers
In Tune I2, Air Raid Filter, Air Raid MIT, throttle body bypass, straight pipe exhaust
Cognito UCAs. Kryptonite UCA ball joints. Kryptonite tie rods. Kryptonite death grip Idler. Moog HD pitman.
5.13 gears. E-locker front
Bilstein stabilizer
|
09-08-2010, 07:54 PM
|
 |
Hummer Veteran
|
|
Join Date: Jun 2009
Location: Texas
Posts: 122
|
|
Re: premium unleaded
My 09 H2 manual recommends that premium be used. The engine on the H2 was changed in 08.
|
09-09-2010, 02:54 AM
|
 |
Hummer Professional
|
|
Join Date: Aug 2007
Location: Bartlett, Illinois
Posts: 486
|
|
Re: premium unleaded
Quote:
|
Originally Posted by Z06RB
My 09 H2 manual recommends that premium be used. The engine on the H2 was changed in 08.
|
I notice quite the difference using premium in the 2008, noticed nothing when I ran it in the 2006
__________________
2008 H2 SUV Luxury: Solar Flare ext/Black int
SOLD 2006 H2 SUV Luxury: Pewter ext/Black int.
2002 Corvette Z06 Blue/Ebony (light mods)
1/4 mile: 11.661@118.86
2013 Audi S4
2002 Yamaha YZF R1 Blue/White
1/4 mile: 10.51@136
2006 Sea-Doo RXP (70.6mph GPS)
2005 Sea-Doo RXT
|
09-09-2010, 05:03 AM
|
|
Hummer Veteran
|
|
Join Date: Jun 2009
Location: Texas
Posts: 122
|
|
Re: premium unleaded
Quote:
|
Originally Posted by MVR 155
I notice quite the difference using premium in the 2008, noticed nothing when I ran it in the 2006
|
Good to know. I have not tried regular in it. |
09-09-2010, 05:54 AM
|
 |
Hummer Professional
|
|
Join Date: Feb 2004
Location: Annapolis, MD USA
Posts: 365
|
|
Re: premium unleaded
The 6.2L has a compression ratio of 10.5:1 vs the 6.0L which has a 9.4:1 ratio so I can understand why the newer trucks recommend premium fuel.
I am happy  I can run on regular because it is $.30 more per gallon for premium now! That would be almost $10 more per fillup. |
09-10-2010, 12:32 AM
|
 |
Hummer Expert
|
|
Join Date: Feb 2009
Location: Nashville, TN
Posts: 887
|
|
Re: premium unleaded
Quote:
|
Originally Posted by mbdougl
The 6.2L has a compression ratio of 10.5:1 vs the 6.0L which has a 9.4:1 ratio so I can understand why the newer trucks recommend premium fuel.
I am happy I can run on regular because it is $.30 more per gallon for premium now! That would be almost $10 more per fillup. |
....what he said.... 
__________________
2003 Black H2:
Blacked out,7" lift,40" Pitbull Rockers, 20x12 Fuel Octanes and lots of more junk, DemonGuard Brushguard 
2006 Blue H2:
20x12 black Rockstars & 35"s. missed.
2005 Black Mustang Roush Stage 1 #05-1058:
Showcar, Procharged 580HP, 20" Gianelle's, Prokit, 1/8 in 7.56secs.
2009 Silver Cadillac CTS Premium
White interior, lots of future mods.
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Hybrid Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +1. The time now is 03:29 AM.
|
