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Fuel [message #302614]

Sat, 25 June 2016 17:27

jor

Messages: 43
Registered: June 2016
Location: Tucson

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1. OCTANE: I'm reading the manual and it indicates that the 455 uses "87 average octane." I was advised by the PO to run 91 (rebuilt engine with 5,000 miles). What is the consensus here on appropriate octane for a stock 455 with stock ignition timing?

2. TANKS: I was under the impression that the GMC has two 25 gallon fuel tanks but the manual states, "...auxiliary tank normally contains seven to nine gallons." Not sure what that means. Also, I was told that fuel is drawn from tanks and that it is not necessary to switch from one to the other with the fuel tanks rocker switch on the dash. Is that the case?
Thanks.
jor

John O'Reilly 76 Eleganza II (quad bags, disc brakes w/ reaction arm. 3.70 gears, manny trans, headers, Patterson dist.) Tucson, AZ

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[Message index]

		Fuel By: jor on Sat, 25 June 2016 17:27
		Re: Fuel By: A Hamilto on Sat, 25 June 2016 17:45
		Re: [GMCnet] Fuel By: Mr ERFisher on Sat, 25 June 2016 18:05
		Re: [GMCnet] Fuel By: jor on Sat, 25 June 2016 18:34
		Re: Fuel By: JohnL455 on Sat, 25 June 2016 20:49
		Re: Fuel By: A Hamilto on Sat, 25 June 2016 21:22
		Re: [GMCnet] Fuel By: emerystora on Sun, 26 June 2016 09:44
		Re: [GMCnet] Fuel By: jor on Tue, 28 June 2016 14:36
		Re: [GMCnet] Fuel By: A Hamilto on Tue, 28 June 2016 16:34
		Re: [GMCnet] Fuel By: Matt Colie on Wed, 29 June 2016 06:51
		Re: [GMCnet] Fuel By: jor on Wed, 29 June 2016 15:28
		Re: [GMCnet] Fuel By: Carl S. on Thu, 30 June 2016 15:46
		Re: Fuel By: jhbridges on Sun, 26 June 2016 08:15

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