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

modified

Administrator
Staff member
Joined
Jul 8, 2019
Messages
2,298
Reaction Points
5,665
Location
Austin, Texas
Current Ride
2017 Ford Raptor
Current Ride #2
2020 Diesel Tremor
What octane of fuel is everyone running in the new 7.3l engine?
 

HoosierDaddy

Tremor Fan
Joined
Nov 29, 2019
Messages
41
Reaction Points
39
Military
Marines
Current Ride
15 Outback, 85 K30 CUCV
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

Tremor Fanatic
Joined
May 3, 2020
Messages
118
Reaction Points
175
Location
Philly burbs
Current Ride
2020 f250 tremor
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
 

Driftwood

First Tremor on Methods!
Staff member
Joined
Mar 4, 2020
Messages
1,916
Reaction Points
3,611
Location
Driftwood, TX
Current Ride
2020 F250 Tremor 7.3L Lariat w/ Ultimate & Sport
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.
 
Last edited:

leogeo

Tremor Fanatic
Joined
Nov 26, 2019
Messages
113
Reaction Points
166
Location
Wyoming
Current Ride
2020 F250 Lariat Tremor
Current Ride #2
2013 Taurus SHO
85, which is regular at this altitude
 

JC_Tremor

Toasty
Joined
May 30, 2020
Messages
982
Reaction Points
1,072
Location
Tejas
Military
USN
Current Ride
Focus ST
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

Tremor Fiend
Joined
Jan 20, 2020
Messages
252
Reaction Points
466
Location
Gig Harbor, Washington
Current Ride
2020 F250 7.3 Tremor Lariat, Magnetic w/chrooome
Current Ride #2
Duckworth XL 30
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

Tremor Fanatic
Joined
Jul 30, 2020
Messages
118
Reaction Points
172
Location
Texas
Military
Army
Current Ride
2020 F350 King Ranch Tremor
Current Ride #2
2016 F150 King Ranch
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

Tremor Fiend
Joined
Jul 22, 2020
Messages
499
Reaction Points
771
Location
GA
Current Ride
7.3 XLT Tremor
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

Founding Member
Joined
Jan 17, 2020
Messages
889
Reaction Points
1,474
Location
Montana
Current Ride
2020 F250 Lariat 6.7 Powerstroke
Current Ride #2
1974 F250 Highboy
Diesel. Wait, wrong thread
 

Latest Discussions

Ford Tremor Supporting Member Badge
Top