RRSport

Lets hear which fuel grade you're using in your F150.

I use 89(mid grade) for my 13 EcoBoost.

21RRF150

iTrader: (1)

I use 89 because in my area it contains no ethanol. Also, it's not in the poll

fleetnuts

I use 91 in my truck, had a slight surging issue at idle. Would sure about 200rpms, know it doesn't do it, but could be the new spark plug wires, plugs, coil pack, and fuel filter in combination with the 91 that helps lol and mpgs went from 13 to 15

goneMINIcrazy

93 in my '12 EcoScrew FX2. 93oct is only $3.30 right now at top tier gasoline stations. I have observed a 1-4 MPG gain between 93 and 87. Also running a 93oct Socal/SSI tune so don't want to wreck the engine.

sdatrlp23

iTrader: (2)

I use 93 octane. Just filled up yesterday at $3.25/gallon.

SteveLord

I use to use regular with no ethanol. But today was a different story at BP....

http://www.omaha.com/article/2013092...130928921/1707