This thread will never die.......some tunes like Gorilla 93 XLT super clean Brillo pad infused kryptonite treated gas and some don't.....some use terms like "butt dyno" (a placebo) which I toss in the trash pile. A simple indicator of the performance of a fuel under normal conditions is doing a mileage test over the same route several times with several different fuels. Nothing has changed on my MP-215 2016. Shell 93 here with ethanol provides a 2 to 2.5 mpg loss over the best performing fuel of Midnight Oil (local stations) selling Marathon 93 non ethanol. That is almost a 7% loss in power produced at highway speeds of indicated 75 MPH (73 true speed) on cruise. BP here is second best down by about .5 mpg under the non ethanol.
As also stated Randy at Mountune had issues with Shell on that tune. Works great in our Coyote it seems, just not Fifi. You cannot compare gas from regional areas, the mix for ME is not the same for LA. With all the different mods and tunes what cannot be determined for YOU is "what is the best" other than opinions. The gas that burns the most efficiently will produce the most power, gas mileage is a free and simple test to see what fuel/mix works best with your car. If you race or acceleration is your priority then the 1/4 mile times would tell you much more than your anatomy by using your calibrated "butt dyno", LOL.
I am thankful that here we have choices. My "butt dyno" feels my daughters stock FiST is faster due to the strong acceleration when the torque pulls hard at about 4500 RPM. On the other hand the MP-215 pulls strong lower and builds without the jerking your head back transition. My FiST walks away from hers in third gear. I've been driving way to long to put faith in butt dyno's. I prefer numbers and visual data. My rotary Mazda's did not feel fast due to a fairly linear power delivery. But they were compared to the competition.
The most fun posts we have are the "what is best" oil, gas, tires, batteries, transmission fluid, radiator, I/C, air filters, oil filters....blah blah blah. And the answer is always the same. What ever pleases you is the best! I can provide a list of what makes me feel safe and secure in the longevity/performance of our Ford cars, I'm sure it would not match any other list.
As to Shell gas I'll pass by a Shell for Fifi and pull in for the Mustang. Gave Shell another test not 6 months ago and same results, still sux in my car with MP-215 tune compare to other fuels. I don't know why and niether did Randy at Mountune, The only quote I have seen from him simply stated the only fuel he had issues with was Shell and no further explanation . We know the numbers don't lie and are not subjective. I paid for my HP and will use the fuel that gives me the performance I paid for. I'm sure most others will use what works for them, human nature at work. As our Forum is predominantly modded cars now the focus is on special mixes to match special tunes and very important to them obviously. At home I use 93 non.....on the road any top tier 93 alky but Shell. Prefer BP for availability and consistency. I do not buy convenience store, supermarket or mystery truck stop gas unless I am in W. Texas or UP MI and have zero choice.
BTW this is not some rouge "tuners" opinion. It was expressed with data to back it up according to Mountune who had to keep their tune legal long before another "tuner" made their claims. I could care less about any illegal tune, that is not me. I lived in Cali for a brief time in '69 looking at and breathing the brown air. No desire to add to that pollution anywhere. To each their own.
FiST on!
As also stated Randy at Mountune had issues with Shell on that tune. Works great in our Coyote it seems, just not Fifi. You cannot compare gas from regional areas, the mix for ME is not the same for LA. With all the different mods and tunes what cannot be determined for YOU is "what is the best" other than opinions. The gas that burns the most efficiently will produce the most power, gas mileage is a free and simple test to see what fuel/mix works best with your car. If you race or acceleration is your priority then the 1/4 mile times would tell you much more than your anatomy by using your calibrated "butt dyno", LOL.
I am thankful that here we have choices. My "butt dyno" feels my daughters stock FiST is faster due to the strong acceleration when the torque pulls hard at about 4500 RPM. On the other hand the MP-215 pulls strong lower and builds without the jerking your head back transition. My FiST walks away from hers in third gear. I've been driving way to long to put faith in butt dyno's. I prefer numbers and visual data. My rotary Mazda's did not feel fast due to a fairly linear power delivery. But they were compared to the competition.
The most fun posts we have are the "what is best" oil, gas, tires, batteries, transmission fluid, radiator, I/C, air filters, oil filters....blah blah blah. And the answer is always the same. What ever pleases you is the best! I can provide a list of what makes me feel safe and secure in the longevity/performance of our Ford cars, I'm sure it would not match any other list.
As to Shell gas I'll pass by a Shell for Fifi and pull in for the Mustang. Gave Shell another test not 6 months ago and same results, still sux in my car with MP-215 tune compare to other fuels. I don't know why and niether did Randy at Mountune, The only quote I have seen from him simply stated the only fuel he had issues with was Shell and no further explanation . We know the numbers don't lie and are not subjective. I paid for my HP and will use the fuel that gives me the performance I paid for. I'm sure most others will use what works for them, human nature at work. As our Forum is predominantly modded cars now the focus is on special mixes to match special tunes and very important to them obviously. At home I use 93 non.....on the road any top tier 93 alky but Shell. Prefer BP for availability and consistency. I do not buy convenience store, supermarket or mystery truck stop gas unless I am in W. Texas or UP MI and have zero choice.
BTW this is not some rouge "tuners" opinion. It was expressed with data to back it up according to Mountune who had to keep their tune legal long before another "tuner" made their claims. I could care less about any illegal tune, that is not me. I lived in Cali for a brief time in '69 looking at and breathing the brown air. No desire to add to that pollution anywhere. To each their own.
FiST on!
That does not help those of us who do not have a Midnight Oil/Marathon 93 no alky anywhere nearby to us.
My local choices are; Sunoco 93 E10, Exxon 93 E10, and Shell V Power E10, unless I want to travel 25 miles each way to fill up.
The closest station to me is a Lukoil, but I flat out REFUSE to use that for reasons even beyond any potential performance shortfalls.