Thread: What fuel do you use?
View Single Post
Old Mar 29, 2015 | 02:20 PM
  #4 (permalink)  
Padgett's Avatar
Padgett
Senior Member
Joined: Oct 2013
Posts: 2,152
Likes: 37
From: Orlando
Default Re: What fuel do you use?
Is it because you are in a corn state ? At least in Des Moines, all three grades are shown.

I usually alternate 89 and 93 at the half tank level (Sam's does not have 89 so filled 93 at $2.539/gal yesterday) to stay as close to 91 as possible..

Personally would not use 87 except if nothing else available and then only a few gallons primarily because I doubt that the stock fuel maps in the XF computer can dial in enough advance for 87 PON (any tuner care to comment).

But then IMNSHO the whole drivetrain is a kludge (the Pentastar in my Jeep GC is a superior engine technologically) and needing two spark plugs per cyl is part of the kludge (in good company, the old iron Hemi also needs two pugs per cyl).

Could go into the flame propagation advantages to a four valve, plug in center design compared to a three valve with plugs pushed to the sides so need 2). Won't.

Real future is boosted direct injection but only know of one production car under $25k that has. 125 hp/liter on 87 PON.

Meanwhile is like a GF who doesn't like cats. Is worth it despite the flaws.

 
Reply
0