I never said it wasn't 100% safe. The ECM takes care of the pinging pretty quickly by reducing timing. It is just annoying to me to hear and know that the engine is indeed experiencing detonation even if just for a split second. Mine does not do this at all with 93 octane. YMMV, I just like to give mine the best I can. Another case of you do you, but for me, I do what I feel is best.
The car is always detonating, even on 93. If you hear it on 87 you should be hearing it on 91+
I have both an EcoBoost auto and a GT manual. I like the GT better for the sound and the power. But I am very impressed with how quick the EB is in Sport+ mode. If I used a Mustang as a DD/commuter only I might pick the EB.
As someone that came from Porsches and BMWs I prefer the engine to 'sing' above 4000-5000 RPM. Not at 1200 RPM. I realize that violates the GT credo, but I guess I'm weird that way.
Auto or 6spd? Rear gear matters also, you could have 3.15 or 3.73 depending on what you get. you can run regular (87) but it does affect drive-ability. I have a GT 6spd, 3.55 gear, with 87 I have to keep the rpm above 2k or the motor really lugs. On a busy highway I find I'm bouncing back and forth between 5th and 6th. Once I can stay above 65mph I can set the cruise. I don't have that condition with 93 octane.
The fact that it says in the owners manual that some pinging is normal means no, we are not exaggerating. But it's really up to the owner to decide if it matters to them. I myself am willing to pay the higher price for 91 so I don't have to listen to it. Honesty the way I drive I would never notice a difference in power.
1a) No, a GT does not require 90+. However, I highly suggest that you do use 90+ (premium).
I agree. Mo power is always better. I just hate the pinging. My F150 with Coyote was flex fuel. It LOVED E85. If it was readily available to me I would get an E85 tune.
Iām in the same boat, lund sells a flex tune but itās not worth it for me because itās so hard to get.
I don't want to get into a bun fight here but that is not correct. Both fuel and spark follow a preprogrammed table based on engine rpm, throttle position and MAP sensor (engine load). As long as there is no knocking it will follow the table, which has a maximum value. It does not keep going until something goes wrong. There's no AI in the car, it doesn't learn were the limit is and stay there, it follows the table until it has to pull timing because of knock. Anyone familiar with EFI tuning could confirm that.