Gasoline_Selection
More Turbo
Joined: Mar 2018
Posts: 737
Likes: 13
Man, thanks for the info. I missed that in the manual. I've been running nothing but 87 in the truck since day 1. Despite 2/3rds of its life (so far) towing our fiver. MPG has always been a concern when towing, as I'm only netting 200-240 miles or so between fill ups. I'm in constant fear of getting somewhere where I 'have' to get gas and there's no easy gas stations to fit the fiver through nearby.
Tuned
Joined: Feb 2009
Posts: 400
Likes: 25
From: Queen Creek
Man, thanks for the info. I missed that in the manual. I've been running nothing but 87 in the truck since day 1. Despite 2/3rds of its life (so far) towing our fiver. MPG has always been a concern when towing, as I'm only netting 200-240 miles or so between fill ups. I'm in constant fear of getting somewhere where I 'have' to get gas and there's no easy gas stations to fit the fiver through nearby.
Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
I use 87 minimum (usually Top Tier) in our 2019 F350 6.2 for running around “light”, and will switch up to 89+ when loaded, such as when carrying our truck camper. We used this model in our 2017 F350 6.2 and in our 2000 F250 5.4. My quasi-calibrated butt-o-meter noticeed a smoother idle from the 6.2, and the engine ran very well indeed during RV trips to the SW in the fall of 17 and the Spring of 18. The 5.4’s performance was greatly improved while towing.
I’m generally leery of claims or suggestions that higher AKI fuel will “improve performance” or fuel economy beyond a lightly-loaded baseline for an engine designed to operate on 87 AKI gasoline. However, I do believe that higher AKI fuel can restore some amount of performance lost to stressful operational conditions such as heavy loads and/or high ambient temperatures by allowing the engine to find better optimized ignition timing.
HTH,
Jim / crewzer
I’m generally leery of claims or suggestions that higher AKI fuel will “improve performance” or fuel economy beyond a lightly-loaded baseline for an engine designed to operate on 87 AKI gasoline. However, I do believe that higher AKI fuel can restore some amount of performance lost to stressful operational conditions such as heavy loads and/or high ambient temperatures by allowing the engine to find better optimized ignition timing.
HTH,
Jim / crewzer
Tuned
Joined: Oct 2018
Posts: 410
Likes: 33
I don't believe that the 4.6/5.4 adapted to higher octane ratings without tuning. That's what I'm wondering about the 6.2 though. To me, it reads as though it can adapt the timing MAP to higher octane ratings leveraging the knock sensor and probably others. I am hoping that this is a "full-time" across the board adjustment and not just under heavy loads.
I'm considering running 87 oct + 10% in the winter months and switching to 91 ethanol-free after the winter blend is gone. Will report back if I do.
I'm considering running 87 oct + 10% in the winter months and switching to 91 ethanol-free after the winter blend is gone. Will report back if I do.
Cross-Country
Joined: Apr 2016
Posts: 74
Likes: 0
From: Bitterroot Valley Montana
I don't believe that the 4.6/5.4 adapted to higher octane ratings without tuning. That's what I'm wondering about the 6.2 though. To me, it reads as though it can adapt the timing MAP to higher octane ratings leveraging the knock sensor and probably others. I am hoping that this is a "full-time" across the board adjustment and not just under heavy loads.
I'm considering running 87 oct + 10% in the winter months and switching to 91 ethanol-free after the winter blend is gone. Will report back if I do.
I'm considering running 87 oct + 10% in the winter months and switching to 91 ethanol-free after the winter blend is gone. Will report back if I do.
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Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
Ford revised the 6.2’s intake manifold and cam profiles starting with MY2017. No HP (385) or CR (9.8:1) change, but peak torque was improved (405 @ 4500 old to 430 @ 3800 new).
HTH,
Jim / crewzer
HTH,
Jim / crewzer
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