Mind you the car was bought new and only had 50k km on the clock. Trouble is, the premium gas (103RON/98 octane) was €3/liter (and I'm not even sure the engine can take that without a tune). Moral of the story is, get the best ROI premium you can afford.
It can take that without a tune I run (100 RON) Shell V-Power Racing in my end of the woods which is essentially 98 RON+some additives but is doing it's job never had an engine light come on. Overall no matter how expensive the V-Power Racing it's cheaper than a new engine.All I know is that I ran regular (98RON/93 octane) on Spa-Francorchamps in Belgium and after 2x 30 minutes stints, the engine light came on
Car can take higher octane gas if the afr is the same. It will just give the car more knock resistance. But you couldn't run E85 for example because the afr is way different. So just check that the afr is the same as normal pump gas and you can run it.All I know is that I ran regular (98RON/93 octane) on Spa-Francorchamps in Belgium and after 2x 30 minutes stints, the engine light came on
Yes, that probably helped but at the end of the day it boils down to afr, if you run a 120mm cai without tuning the car for the correct maf you will run lean and create some serious issues at high rpms. If the car is tuned for a larger maf it is a really good idea to run a higher octane 93+2 or +5, this will help keep the afr stable over 6500+ rpms. I learned this on the drag strip, my cars knock sensors would cut timing on 93 because I am tuned for a 114mm maf which allows much more air in at high rpms while ramming air down the throat of the throttle body at over 90 to 100mph. Once I started adding race fuel the day before I hit the track, this never happened again.
There's no octane learning on the coyote, at least not the gen 3. I wish there was to avoid these issues, but Ford didn't think it was necessary I guess. The car can pull up to 10 degrees of timing per event as well as gdi spray, throttle closure and other tricks to stop the knock in it's tracks. But it's better to let it find the soft limit on its own instead of diving headfirst onto it like you usually do with 87.
It means that you likely never owned a wrx/sti/turbo subaru with a boost tune
Your 12:1 compression should be self explanatory then.
Sure, with 93. Around my parts Shell only available with 91. Which is no better/worse than other tier 1 fuels (logged, verified).
Yeah the cheap Shell gas is not good here ether prefer other stations if going bellow the 100 RON of the V-Power but when it comes to performance V-Power every day and 2 times on Saturday ;)