Does anyone drive an Ecoboost premium vehicle and if so, do you notice any differences in power or fuel efficiency?
7 Likes
I used my 23 PowerBoost on Premium. I received an extra 1.5–2.0 mpg, but that did not make up for the extra $.40 per gallon I was spending.
All F150s are built to run off 87. Don’t let anyone convince you otherwise. Just run normal
6 Likes
What you meant to say is that all F-150s can run on regular gas, but they’re really built to perform better with premium. So, while regular works fine, premium will give you the best performance.
6 Likes
Although I concur with you that higher octane gasoline will perform better at high temperatures and altitudes because to the greater compression ratio that these fuels would sustain.
There is minimal difference between sea level and below 90 degrees.
5 Likes
Since I’m 500 feet above sea level, it’s generally not hotter than 90 degrees. That’s it, I suppose.
5 Likes
Yes, I’ve observed that running my 3.5L at 91 octane makes it seem like a rocket ship and often gets 2 more mpg than running at 85.
In terms of total miles per tank, I often get 600–650 miles with 85 octane, but I get 700+ miles with a 36 gal tank while using 91 octane.
4 Likes
Premium will make almost all cars run a little bit better. Add a turbocharged engine, and it will perform even better.
4 Likes
When I’m towing, I use midgrade fuel. If I’m not, I can tell the difference.
3 Likes
When using a turbocharged or supercharged engine at high altitudes, you should utilize 87 instead of 85. At altitude, 85 is OK for normally aspirated engines (which require 87), but not for forced induction engines.
It is possible to use less octane than recommended at altitude due to a decrease in air pressure. However, the engine of a turbo is pressurized, meaning that the outside air pressure is irrelevant.
At any altitude, 85 will cause a turbo engine to operate poorly and may cause damage.
2 Likes
For cars with forced induction, incorrect e85 is similar to race fuel. If the accompanying fuel modifications are calibrated properly, e85 may provide absurdly high horsepower.
1 Like
85 octane is not not the same as e85 you dummy.