Join Date: May 2009
Location: Tustin, CA
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I have been getting 8-9 mpg since 2013. Some of my heavier "crazy" tunes definitely blacken a lot more than others, and with that my mpg went down to 7mpg (~2016). The new tunes from Eric/Matt/Vivian's are definitely running leaner as the black smoke is "offensive", in more states than just here in Commifornia. One can be anonymously turned into the Commifornia CARB for black smoke emitted from the tailpipe. Also adding a little tuning to the FICM also causing more smoke and worse mileage. I have been playing with all this for 7-8 years here and there. The mpg changes are small, but not significant. Archoil oil and fuel additives, and other additives "kind of" help a little, it appears. But a few take-offs with a heavy foot destroys all those "saved" mpgs.
Bottom line, it can be fully tuned, bulletproofed, etc....and you can get (relatively) great mileage....but if you raise it and put big tires on it (40's with 4.56's) and huge injectors......none of it helps when compared with those huge-*** heavy tires; You will get relatively poor mileage. I only drive 10 miles to work, so it takes 1 gallon each way. 60 gallon tank = fill-up once a month or so.
Hey, I had an M38A1 Willy's back in high school, basically a Jeep CJ5, with a built Ford 351 Windsor I built, 4 barrel 650cfm double pumper carb, cam and everything, Ford 4-speed top-loader manual trans, with an 18" lift (axle under spring swap, etc, etc) and full size Ford 9" (in rear) and Dana 44 (in front) on 36" tires with 5.38's. Tires stuck out 12 inches.....it looked like a spider. It was a *****en Jeep. Chrome Headers direct to pipes. It would idle like a race car and the fumes would burn your eyes. It would smoke the tires in all 4 gears.I got 6mpg when fuel was leaded/unleaded was way less than $1/gallon (1980's).
So, getting 8-9 with a 10,000 diesel monster isn't that bad.
Maiden........Sweet. Haven't seen them since 1984's Long Beach Arena in SoCal, when they recorded it.
2003 F350 LB 6.0L 4.88 10.5" ICON lift,SWAMPS Custom Engine-ported intake-58V FICM,Stage1Cam,CeramicCoatedCutPistons,PowerMax w/Batmowheel,ARPs,195cc/75%,EGR/Cat Delete,BulletProof OilCooler&H2OPump,aFeStageIIfilter, BanksIintake/intercooler, 270A Alt,PHP's SCT X3 140hp&FICM tune,Dieselsite Coolant&Magnefine PS&AmsoilOilFilters,Blue 60psi Spring, [email protected],Banjo Bolts,MishimotoRadiator,4" exhaust,40" Nitto Muds on 22x14's