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Discussion Starter #1
Has anyone give much thought the Chevy Blazer's fuel type? Regular 87 octane is the minimum requirement and really the best on our wallet. Its what I anticipate most of us will be using while not giving much thought to pros/cons of it 87 vs. higher octane fuel blends. To note, Chevrolet mentions E85 or FlexFuel "cannot be used in this vehicle", just in case you were wondering. It may cause damage that will void your warranty.

As for what Chevrolet specifically outlines we should use to get the most from our Blazers:

Recommended - Regular 87 Octane, Unleaded Fuel
Use only Regular 87 octane — (R+M)/2 — or higher unleaded gasoline in your vehicle. TOP TIER Detergent Gasoline is recommended.

Prohibited Fuels
Do not use fuels with any of the following conditions; doing so may damage the vehicle and void its warranty:
  • For vehicles that are not FlexFuel, fuel labeled greater than 15% ethanol by volume, such as mid-level ethanol blends (16–50% ethanol), E85, or FlexFuel.
  • Fuel with any amount of methanol, methylal, ferrocene, and aniline. These fuels can corrode metal fuel system parts or damage plastic and rubber parts.
  • Fuel containing metals such as methylcyclopentadienyl manganese tricarbonyl (MMT), which can damage the emissions control system and spark plugs.
  • Fuel with a posted octane rating of less than the recommended fuel. Using this fuel will lower fuel economy and performance, and may decrease the life of the emissions catalyst.
Top Tier Fuel
GM recommends the use of TOP TIER Detergent Gasoline to keep the engine clean, reduce engine deposits, and maintain optimal vehicle performance. Look for the TOP TIER Logo or see www.toptiergas.com for a list of TOP TIER Detergent Gasoline marketers and applicable countries

TOP TIER™ Detergent Gasoline Brands (USA)
  • 76
  • ARCO
  • Aloha
  • Amoco
  • BP
  • Beacon
  • Break Time
  • Breakaway
  • CITGO
  • Cenex
  • Chevron
  • Conoco
  • Costco Wholesale
  • CountryMark
  • CountryMark PLUS
  • Diamond Shamrock
  • Express Mart
  • Exxon
  • Fast Fuel
  • HFN - Hawaii Fueling Network
  • Harmons Fuel Stop
  • Hele
  • Holiday
  • Irving Oil
  • Kirkland Signature Gasoline
  • Kwik Star
  • Kwik Trip
  • MFA
  • Marathon
  • Metro Petro
  • Mobil
  • Ohana Fuels
  • Phillips 66
  • QT
  • QuikTrip
  • Ranger
  • Ranger Fuel
  • Ranger Mustang
  • Ranger Stallion
  • Ranger Thoroughbred
  • Reeders
  • Road Ranger
  • Shamrock
  • Shell
  • Sinclair
  • Sunoco
  • SuperAmerica
  • SuperFuels
  • Texaco
  • Tobacco Outlet Plus Grocery
  • Valero
  • Value America
  • WOW
  • Win Win
TOP TIER™ Detergent Gasoline Brands (Canada)
  • ARCO
  • Amoco
  • BP
  • Beacon
  • Breakaway
  • CITGO
  • Chevron
  • Co-op
  • Costco Wholesale
  • Diamond Shamrock
  • Esso
  • HFN - Hawaii Fueling Network
  • Hele
  • Holiday
  • Irving Oil
  • Kirkland Signature Gasoline
  • Marathon
  • Mobil
  • Ohana Fuels
  • Shamrock
  • Shell
  • Sinclair
  • Sunoco
  • Tempo
  • Texaco
  • Valero
  • Value America
  • WOW
 

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I rather not give it much thought. 87 octane and any gas station I always frequent which turns out to be Shell, an energy company on this list.
 

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Discussion Starter #3
I rather not give it much thought. 87 octane and any gas station I always frequent which turns out to be Shell, an energy company on this list.
Hence "its what I anticipate most of us will be using" but there will always be that crowd with good and not so good reason for using higher octane. Don't know if you've been paying attention to some of the latest news reports on the energy sector but there's a push for 91 to replace 87 as the new standard. I bet the Blazer was well established selling units at 5-figure volumes we might see 91 be the Blazer's minimum. My guess is it wasn't done here to secure sales. Can't score soccer moms with 91 octane, 87 is more like it.

As for the push to 91 that I read on gmauthority:


GM Once Again Calls For Premium Gasoline To Become New Standard

General Motors wants to make premium fuel the new standard, and it’s the second time vice president of global propulsion systems Dan Nicholson has spoken out for the change.

The executive addressed the American Fuel and Petrochemical Manufacturers (AFPM), and Forbes reported on Monday that Nicholson believes now is the time to make the switch. Why? It comes as automakers diversify powertrains and experiment with more battery-electric cars and other fuels, such as fuel cells.

The switch would make a fuel with a 95 RON (research octane) and pump octane (PON) of 91 the standard. Translation: 91 pump gasoline would replace 87 gasoline as standard in North America at gas stations.

With a switch, automakers could tune engines for higher compression and extract more work from the fuel itself to increase efficiency. Nicholson said minor changes in engines could net a 3 percent increase in efficiency alone.

The major question is how the consumer would react to such a change. Although GM predicts no major upfront cost increases for engines tuned to run 91 octane as standard, a gallon of premium fuel cost $0.52 more on average across the United States as of last week. The cost to fuel up could outweigh the slight efficiency benefits.

However, the AFPM said refineries would ultimately shift their focus to produce the premium fuel, which would bring down its cost per gallon. We could see 91 octane cost about the same as 87 octane, but only if refineries matched the production mix to a new fuel standard.
 
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