Gas...brand and octane

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Gas...brand and octane

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Gas...brand and octane - 10/23/2007 4:34:55 AM

Body Armor Guy

Posts: 47
Joined: 10/10/2007
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Has anyone found that their H3 runs better on any particular brand of gasoline...Shell, Texaco, BP, Murphy, etc? How about octane?

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RE: Gas...brand and octane - 10/23/2007 5:32:00 AM

TexH3

Posts: 224
Joined: 9/14/2007
From: North Texas
Status: offline

I usually use Shell or Exxon 87 octane. Mine runs fine. Owners manual says 87 octane is all it needs, so that's all I give it.

Sometimes I'll use a discount 87 octane gas, but only once every 3 or 4 tanks.

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RE: Gas...brand and octane - 10/23/2007 6:35:17 AM

SpeedNut

Posts: 248
Joined: 8/10/2007
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You're going to find more of a difference between your local stations than brands. Some run their underground tanks down which begins to suck any sediment to the pump, and into your ride. Brand for brand they're all the same until you get to premium, and the only difference there is what additive they put into it.

(in reply to TexH3)

Post #: 3

RE: Gas...brand and octane - 10/23/2007 6:52:31 AM

Doc Olds

Posts: 3805
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
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This is going to be interesting. Too early for popcorn, I'll just check back later. I prefer Marathon (2nd choice BP) 87, absolutely no Venezuelan crap.

(in reply to SpeedNut)

Post #: 4

RE: Gas...brand and octane - 10/23/2007 10:18:24 AM

Disnydad

Posts: 80
Joined: 11/7/2006
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I burn mostly Hess 87 octane.

(in reply to Doc Olds)

Post #: 5

RE: Gas...brand and octane - 10/23/2007 11:37:46 AM

HumminNBoatin

Posts: 481
Joined: 9/9/2007
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Who ever has the cheapest 87 Octain gas in what ever part of town I am in when I need it. However when towing the boat to the lake 3-4 Hour tow I run 89 Shell.

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RE: Gas...brand and octane - 10/23/2007 3:37:09 PM

mh307

Posts: 147
Joined: 10/7/2007
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I run 87 Exxon.

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RE: Gas...brand and octane - 10/23/2007 7:19:56 PM

GorillaH2

Posts: 1413
Joined: 7/30/2007
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I run on 93 from shell every two tanks and 87 every other time

(in reply to mh307)

Post #: 8

RE: Gas...brand and octane - 10/23/2007 8:19:57 PM

H3 Xman

Posts: 150
Joined: 9/17/2007
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Up in PA I always go to Sheetz. And 87 is the octane i use.

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Post #: 9

RE: Gas...brand and octane - 10/23/2007 9:22:45 PM

dizzy

Posts: 271
Joined: 9/26/2006
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The manual says 87, so that,s what she gets.

(in reply to H3 Xman)

Post #: 10

RE: Gas...brand and octane - 10/24/2007 3:12:28 PM

SEMO H3

Posts: 44
Joined: 6/8/2006
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While 4 wheelin in Colorado I saw 85 Octane. And 87 was the mid-grade gas never seen that before.

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Post #: 11

RE: Gas...brand and octane - 10/24/2007 5:21:47 PM

SteveO

Posts: 324
Joined: 6/2/2007
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87 octane and buy from a southwest brand " 76 union "or UNOCAL.

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RE: Gas...brand and octane - 10/25/2007 2:32:14 PM

f5fstop

Posts: 51
Joined: 7/13/2005
Status: offline

Name brand such as Shell, BP, Mobil. Always 87 octane. Higher octane is a waste of money, and will do nothing for performance with the calibration installed via the factory or dealer.
For your reading enjoyment:

Subject:
Fuel and Oil Additives - Facts and Myths/Maximizing Fuel Economy #05-00-89-072A - (10/16/2007)

Models:
2008 and Prior GM Passenger Cars and Trucks (including Saturn)

2008 and Prior HUMMER H2, H3

2005-2008 Saab 9-7X

Attention:
Please direct this bulletin to the Service Manager, the Service Consultants and the Sales Staff. A copy of this bulletin is encouraged to be given to your customer as it is written with the consumer in mind. You may also post this bulletin in your customer lounge or waiting area.

This bulletin is being revised to update model years, Top Tier fuel providers and revise the Federal Trade Commission website address. Please discard Corporate Bulletin Number 05-00-89-072 (Section 00 -- General information).

A Statement About Fuel Economy
As gasoline prices have increased, the consumer has shifted priorities to become increasingly concerned with fuel consumption. GM is presently proud to offer over 30 cars in the U.S. with EPA highway estimates of at least 30 mpg. In Canada, vehicles are rated for fuel consumption in litres per 100 kilometers. GM offers over 20 vehicles in Canada that consume less than 7.0 L/100 km on the highway. The information below contains reasonable and prudent advice for your dealership and the consumer to get the most from every gallon or litre of gas.
The information below is presented in two easy to understand sections:

What Not To Do: Engine and Fuel Additives, Alternate Fuels, and "Miracle" Products

What to Do: Maximizing Fuel Economy/Minimizing Costs

WHAT NOT TO DO: Engine and Fuel Additives, Alternate Fuels, and "Miracle" Products
Various unproven products to improve vehicle fuel economy have been reported ranging from magnets that align molecules to chemical combustion improvers.
Most products claiming to provide benefits are based on unsubstantiated claims. Those that do present "scientific" results generally either have too little supporting data to be conclusive, have not conducted experiments in a controlled fashion, or cannot be substantiated by anyone else but the product's manufacturer.
The U.S. Federal Trade Commission summarizes results for products tested by the federal government at www.ftc.gov/bcp/edu/pubs/consumer/autos/aut10.shtm. A review of the list shows that the majority did not work, and for those that showed some effect, the benefit was too small to be cost effective.
Harmful Ideas That May Damage Your Vehicle and Increase Emissions
One more recent poor idea to improve fuel economy that should not be attempted is to blend either kerosene or diesel fuel into gasoline. Why? Both kerosene and diesel fuel are distillate fuels meant for use in compression ignition engines, not spark ignition engines. They have very low octane and since they are heavier (higher density) than gasoline, they will cause heavy engine deposits and degradation of engine oil.
Notice: Never put Kerosene or Diesel Fuel in your Gasoline Engine vehicle. This may result in inconsistent performance and permanent damage to your vehicle that is not covered by your New Vehicle Warranty.
Chemicals that are normally used as solvents also should not be used. These include acetone, ketones, and methanol. These solvents can be incompatible with your vehicles rubber or sealing components, and may dissolve the

< Message edited by f5fstop -- 10/25/2007 2:37:07 PM >

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Post #: 13

RE: Gas...brand and octane - 10/25/2007 5:39:22 PM

SpeedNut

Posts: 248
Joined: 8/10/2007
Status: offline

Great info f5fstop. I wonder why Sunoco only got certified for Canada, and not the US?

Another thing to note, due to effects of pipeline transport, there is a little bit of grade-to-grade mixing at the interface between grades. So if there is a batch of 92 octane next to a batch of 87, they'll switch storage tanks before the mixing area reaches the destination, and minimally upgrades the 87 octane product (depending on the receipt tank anywhere from .1 to .3 octane). That's why at the pump you see on the stickers "at least 87 octane"

(in reply to f5fstop)

Post #: 14

RE: Gas...brand and octane - 10/26/2007 6:51:21 AM

Doc Olds

Posts: 3805
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline

I saw this at the Hummer dealership. BTW f5fstop, I bought my 3 from the same dealer you got yours from. Thanks for the info. I was waiting for the bru haha that always develpoes in these "what octane" threads, I guess you chilled that out.