What octane of fuel do you run with the 7.3l?

modified

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What octane of fuel is everyone running in the new 7.3l engine?
 

HoosierDaddy

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premium, i put it in everything,lawn mower, weedeater,4 wheeler and motorcycles. just do and always have. waste or not. makes me feel warm and fuzzy all over.😎
From what I have read, with autos, premium or regular, pick an octane and stick with it. Something about modern motors , computers and adjustable timing not liking to jump around so much.
I run whatever the vehicle calls for. Wifes turbo sees only premium, garden tractor and lawn equipment get premium also, no reason for it.
My car gets regular.
 

Jakebrake

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every ford i have ever had has run just as well on cheapo as premium.

my first one, (75 ltd) i swore could run on grape md 20/20
 

driftwoodsvt

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I've run 93 octane since day one, with 2400 miles on it now. Maybe I don't need 93 octane but since my tractor and 4 wheelers do, it's habit. Plus I ran 93 Octane in my 2018 Raptor while I owned it.
 
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leogeo

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85, which is regular at this altitude
 

JC_Tremor

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Has anyone tried the 87 octane but ethanol free? Here 87 with ethanol is 1.66$ per gallon vs ethanol free 87 at 2.12$ per gallon. Supposedly better mileage with ethanol free, less corrosion issues.
 

ShiverMeTimbers

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Has anyone tried the 87 octane but ethanol free? Here 87 with ethanol is 1.66$ per gallon vs ethanol free 87 at 2.12$ per gallon. Supposedly better mileage with ethanol free, less corrosion issues.
Ethanol was an issue for outboard boat engines, and still can be. As long as ethanol fuel isn't sitting in your tank for 2 months or more, its fine. If its sitting that long you should use a fuel storage additive. For small engines the ethanol can really gum things up (lawnmowers, etc). I use non-ethanol for the boat, lawnmower, etc.

For the Tremor I follow the owner's manual: 87 for regular driving, 91 or 92 for towing, and if I want to splurge and get every available drop of power I splurge for non-ethanol.
 

jbdsheepdog

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Has anyone tried the 87 octane but ethanol free? Here 87 with ethanol is 1.66$ per gallon vs ethanol free 87 at 2.12$ per gallon. Supposedly better mileage with ethanol free, less corrosion issues.
I have 90 octane ethanol free here, and have run it on my last 2 tanks. MPG jumped and I can get 14.5-15 pretty easy on the hwy if not better.
 

thevol

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I run 87 in everything I own, no matter if it calls for it or not... never had a problem with pre-ignition on a modern engine. They will adjust timing to prevent damage. There could be some minor performance increase on some engines, but I doubt a stock NA 7.3 engine is one of those unless there is an aftermarket tune that could take significant advantage of it.
 

Whyte Rhyno

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Diesel. Wait, wrong thread
 
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