Car and Driver octane test
Before anyone gets excited about the latest test showing that the 3.5 Ecoboost runs a lot better on 93 octane please take notice that this is the HO version only available in the Raptor and the Limite...
Forum Discussion
Bionic Man wrote:
So, did Ford change their recommendation in the owners manual away from premium fuel?
They never recommended premium for the standard output Ecoboost unless you wanted the added performance output which is only noticed under high loads. They had the same recommendation for all their engines that could alter their power output based on the octane rating of the fuel like the 5.0L and 6.2L.
Some people take this recommendation for added performance as a must when towing because the manual states that the added performance will mostly be felt when towing(i.e. high load). This is true because you aren't really going to nice an extra 20 hp unless you go wide open throttle. You can tow with the Ecoboost on regular fuel, but you want have the added hp.
