This is listed in your owner's manual. For my 2001 VW Beetle, I use ethanol, and it seems to run just fine
87 octane
The northstar engine were remodified to take regular unleaded.I use thw mid in my 01 aurora.
For a 2001 Ford Ranger : The ( SuperCab ) gas tank holds ( 19.5 U.S. gallons )
Super or 93 Octane
very carfully
only regular unleaded.
Just regular gas.
" regular " unleaded , 87 octane
According to the 2001 Mercury Mountaineer Owner Guide : For the 4.0 litre SOHC , v6 engine and the 5.0 litre V8 engine ( " regular " unleaded gasoline , 87 octane )
unleaded
Regular gas
Regular unleaded , 87 octane