I have a 2005 4.0 V6 Auto Double Cab Ranger, I do up to 480 km on 78 lit (300 miles on 20 gal, 1gal US = 3.8lit ??) which returns +- 14 mpg or +- 6km/lit. Is this acceptable or can it be better ? If better, then obviously the question is how/where/what etc. In S.A. we run 95 octane unleaded and I run mostly at +- 4000ft above sea, nowadays, at +- 1000ft above.
After the last lube service (110,000km), plugs were changed. Dealer fitted NGK's not "platinum" from Ford. Now at idle, in drive, a slight miss-miss. Shift into "N" or "P" and it splurges from 800rpm to 300rpm, sometimes stalls, sometimes recover and miss-miss etc. starting is easy, then will idle ok with miss. Just after driving and shifting out of gear will the stall happen, about 50% of the time.
14 mpg is OK if you are towing a trailer with a 4,000 lb load or you drive with the pedal to the floor all the time. I think you may have a problem and I would start with putting Motorcraft or Autolite Platinum plugs in it.
In S.A. So I will probably try to get Motorcraft Plat's. I hear they are expensive though... Thanks for the input. Did a check again on figures from logbook. Doing about 7.5 km/lit. How does that convert to MPG in US gallons ?
FWIW, in the cold my truck will get anywhere from 10mpg(below zero city) to 16(80 degrees,city) So I think you mileage maybe in the correct range. I'm not sure what you got before this.
If you can get your hands on autolite plugs those should work for you. As far as the motorcraft plugs they are a double platinum plug. To get the 100k mile tune up interval. Which is overrated when other plugs are cheaper and get a slight bump in mileage (copper).
Im not sure what the "dealer" did. They should fix it. Especially if this just happened recently.
99 x-cab 4x4 4.0l auto
mods, cranked t-bars, silencer delete, k&n drop in, Rebuilt trans ,Trans Go stage 3 shift kit, 3200stall Fuddle Racing Torque Converter,
VANIR 63mm TB, Roush split rear exit exhuast, E-Fan, JBA Headers
Auto up/down both windows, OHC, EATC (soon to be modded)
ive got a 94 4wd and i was getting 15mpgs. i changed the spark plugs and plug wires and it shot up to 18mpgs. in the process i accidently crossed one of the wires and it started to miss. that may be the explanation to your missing problem. mine was a tad bit harder to start though.
I have a 2005 4.0 V6 Auto Double Cab Ranger, I do up to 480 km on 78 lit (300 miles on 20 gal, 1gal US = 3.8lit ??) which returns +- 14 mpg or +- 6km/lit.
Surprised no one else commented on your math. Looks like you are dividing miles driven by the size of the fuel tank, which isn't accurate. You need to use a trip odometer and divide miles driven by number of gallons pumped at next fill up.
I'd be doing some investigation. That mileage seems bad to me even with winter blend. If you are on summer blend 87 octane it should be a lot better. You don't say if you have 4x2 or 4x4.
I haven't had my truck all that long, but I've filled the tank five times and averaged 18.2 so far on winter blend with a 4.0L 4x4 auto. It is bone stock with 25K miles. Most of the miles have been my 40 mile round trip commute on 2 lane roads. Temps have been between -10 and 32 F.
I'd take it back to the dealer if it misses. Crappy mileage and a miss = a problem.
Thanks for all the input. Just to clarify, SOHC 4.0L Auto 5-speed 2x4 with diff lock, double cab, built in S.A. No, not dividing miles by tank size, I regularly (almost ALWAYS) run down to "empty", then fill up, normally 75lit to (once only) 81.4 lit ! Guess I just made it to the pumps...
We're in S.A. remember ! Un-leaded fuel comes ONLY in 95 octane, zilch else.... 87 is available but is leaded still. And yes, some hilly driving, definitely not flat level road, but not excessive gradients, at least not with the 4.0 up front !