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#1
05-27-2007, 09:56 PM
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85 Octane?
I just moved to Denver from Texas and I noticed that the regular gas here is 85 octane, where in central Texas it is 87 octane which I always run in my truck. Is it bad to run 85, or should I shell out for the "mid grade" 87?
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2002 1500 Ext. Cab 4.8L 2wd. K&N FIPK, Cat Back Exhaust, Rancho RSX Shocks, Silverstar Headlights High & Low, Infinity Reference Door Speakers & 10" Dual Voice Coil Sub. 265/75/16 BFG AT/KO's, Spray-In Bed Liner, Hella FF75 Fog Lights, Hella FF75 Driving Lights. 
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#2
05-27-2007, 10:01 PM
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Re: 85 Octane?
85?!?!?!?! WTF? Maybe it has something to do with altitude?
__________________
   "When I step on the gas, I want people to think the world is coming to an end!" - Homer Simpson 2002 ECSB, Nelson Tune, LS1 electric fans, 145A alternator, K&N FIPK, 160º T-stat, TB coolant bypass, Corvette servo, 4 headlight mod, blue LED gauge cluster
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#3
05-27-2007, 10:14 PM
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Re: 85 Octane?
It's also a lot more expensive. 85 is about 40-50 cents more than 87 back home.
__________________
2002 1500 Ext. Cab 4.8L 2wd. K&N FIPK, Cat Back Exhaust, Rancho RSX Shocks, Silverstar Headlights High & Low, Infinity Reference Door Speakers & 10" Dual Voice Coil Sub. 265/75/16 BFG AT/KO's, Spray-In Bed Liner, Hella FF75 Fog Lights, Hella FF75 Driving Lights.
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#4
05-27-2007, 10:16 PM
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Re: 85 Octane?
Yes, it's an altitude issue. At that altitude the air pressure is lower and you are able to use fuel with that octane rating. It's fine to use if you are staying in that area for any length of time. If you were on a trip and "just passing through", then it is recommended to mix it with a higher octane gas.
Quote:
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Thought for the Day… Alcohol does not make you fat - It makes you lean... against tables, chairs, floors, walls and ugly people.  If a prostitute here in America loses her job to a prostitute in India , is that considered "outwhoring"??-Jay Leno
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#5
05-27-2007, 10:19 PM
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Re: 85 Octane?
Cool, thanks. I will use 85 and let you know if I notice any difference between the two.
__________________
2002 1500 Ext. Cab 4.8L 2wd. K&N FIPK, Cat Back Exhaust, Rancho RSX Shocks, Silverstar Headlights High & Low, Infinity Reference Door Speakers & 10" Dual Voice Coil Sub. 265/75/16 BFG AT/KO's, Spray-In Bed Liner, Hella FF75 Fog Lights, Hella FF75 Driving Lights.
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#6
05-28-2007, 08:39 AM
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Re: 85 Octane?
I'd keep a bottle of octane booster handy, just to cover my own ass.
__________________
"When I step on the gas, I want people to think the world is coming to an end!" - Homer Simpson 2002 ECSB, Nelson Tune, LS1 electric fans, 145A alternator, K&N FIPK, 160º T-stat, TB coolant bypass, Corvette servo, 4 headlight mod, blue LED gauge cluster
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#7
05-31-2007, 01:08 PM
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Re: 85 Octane?
You have less Air in Denver, so less Octane is needed to burn the same amount in fuel.. you will loose MPG unless you install a turbo or super charger.
__________________
  2000 Silverado Z71, 5.3L, K&N GenII Air Intake, Y-pipe Exhaust (no muffler), Bosch Platnium +4 plugs, 242k miles and still running.
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