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Fuel octane?

Messages
25
Reactions
21
Points
2
Location
New Hampshire
Vehicle
2021 ST
That is the most outrageous gap I've ever heard of.
I live in CA and never seen a gap like that. Thanks DeSantis!

I would, of course, forgive the use of 89 in such terrible conditions. (I imagine 91 is a big jump too)
Here in NH 87 is $3.15 93 is $4.25 it’s outrageous. That being said I run 93 unless my wife fills it.
 

Messages
1
Reactions
0
Points
1
Location
Murfreesboro, Tennessee
Vehicle
2021 Ford Explorer ST
Been scrolling through replies, been using 87e10, curious of the difference between 90e0 and 93e10 if anyone had tested
 

Messages
54
Reactions
25
Points
17
Location
DC Area
Vehicle
2020 Ford Explorer ST
I run C16 in my ST. Crazy how much faster it goes...
C16 is leaded so it doesn't like cats or oxygen sensors. It is also much more corrosive to your fuel system.
 

Messages
106
Reactions
47
Points
27
Location
Gurnee, IL
Vehicle
2020 Explorer ST
C16 is leaded so it doesn't like cats or oxygen sensors. It is also much more corrosive to your fuel system.
I know. This was very sarcastic post


Sent from my iPhone using Tapatalk
 

Messages
90
Reactions
44
Points
17
Location
Charlotte
Vehicle
2024 Explorer ST
They definately run better on 93.
Yep, running less than quality "top tier" whatever from the big names and highest available octane in your area is doing dis-justice to the ST. It's a must if tuned to run what your tune specifies as well of course. I threw a few bottles of octane boost/improver in the back just in case I'm somewhere that I can only get 91 with my ZFG 93 tune. Even so I'd probably put it in Eco mode which was untouched by the tune and deal with the loss of performance for safety.
 

Messages
1,038
Reactions
591
Points
162
Location
East Freetown, MA
Vehicle
2020 Explorer ST, Silver Spruce Metalic
I believe the PCM would be able to make the necessary adjustments if you had to fill up and only 91 was available. I don't think the difference between 91 and 93 is significant enough to cause any real adverse affects.
 



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