I own a 2012 Ford Edge 3.5 and I recently purchased a SCT X4 and a 87 and 91 octane tune from Torrie at Unleashed Tuning. I started off with the 87 tune and I could really feel the a boost in power with it. I ran it for 2 tanks of fuel and then tried the 91 octane tune and it was perfect!
In normal traffic the 87 octane tune would start to pull hard just about the time that the transmission shifted. I considered getting Torrie to delay the shift points but decided to try the 91 octane tune first. Gas mileage was about like the stock Ford tune.
In normal traffic the 91 octane tune pulls hard with very light applications of throttle. The throttle response is really great and very linear. Driving in traffic is a pleasure now due to the stronger performance of the engine at low RPMs. In my opinion, this is the way this car should have been tuned from Ford. It is perfect. I just finished the 2nd tank and the fuel mileage is the same or maybe slightly better than in the past. The car rarely feels like it is in the wrong gear any more due to the increase torque at low RPMs. With gas prices where they are now I am paying about $5 more per tank to run 91 octane but because the car is so much more fun to drive now I consider this to be a small price to pay for the added performance.
Torrie responds to emails very quickly. torrie@unleashedtuning.com