SR 4x4 fuel recommendations

Dont forget to push the ECT PWR button or you wasted your money. I just use 87.

 

Makes OPEC happy

 

The higher grade fuels typically have more detergents. I had a mid 80’s Ford 87 octane whole life. One fill of super unleaded and the fuel filter plugged.
It was a large in-line filter also. So my suggestion is use one or the other but don’t switch after 5 years

 

Just FYI the manual states "select octane rating 87 or higher"

My truck ran smoother on 91 E0.

 

I found E0 only one time near a boat ramp at a lake, filled up and ended up getting 23.2 MPG for that entire tank. 22.67 MPG is the best I managed on E10.

 

Ive always been running E0 after my dealers tank ran out. My truck sits for 5 days a week so its a must for me. I would still do the E0 even if i drove everyday though.

 

If I could find it I would use it all the time too, my vehicles can sit for extended periods too.

 

Here 87 has 10%, 89 has 5% and 91 or higher has 0%, so i always filled up with 91.

 

I use 86 octane because i live at altitude

 

They have equal amounts of detergents. Grade indicates it has higher octane rating, it is not higher quality.