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03-26-2006, 09:47 AM
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#1 (permalink)
| | Junior Member
Join Date: Mar 2006
Posts: 1
|  Gas mileage down after Superchips
Made the following changes to my 2002 E150 4.6L, K&N air: changed rear gear from 3.55 to 3.73, tires from Michelin 2.35-75R15 LTX M&S to Firestone Destination LE LT2.35-75R15, NAPA Sensa-Trac shocks, Superchips Perf/Tow setting. Gas mileage was averaging 18.5 with stock package, Superchips 87 octane setting. I knew it would go down some, but now averaging 16.2.
I pull a camper during the summer months, that's why I changed the gear, shocks and went with a heavy duty tire. Oil is Mobil 1 5W-30, synthetic in transmission and rear gear. If I cannot get it better, prefer to change back to 87 octane especially with prices going up. I drive 30 miles one way to work, and the reduced mileage is starting to get expensive.
Any suggestions are welcome, if I could find out what settings to use for shift points and pressure, prefer to change back to regular gas. | 
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06-22-2006, 07:04 PM
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#2 (permalink)
| | Senior Member
Join Date: Jun 2006 Location: K-W, Ontario
Posts: 125
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I'd stick with the 91 octane setting. Keep in mind, superchips is a performance option, it's not meant to give you better fuel economy. It just happens to be a side effect from some superchips users. You can also take the superchips tune off your truck, and run a tank or two of fuel to see if the gear change is what made your mileage drop. I doubt it is the reason, but you never know and it worth a check. For shift points I'd only raise it 400rpm per shift, so there won't be excessive 3-4 shifting around town.
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1993 Dodge Spirit 2.5L TBI, 100hp
1999 Ford Taurus 2V 3.0L, 145hp
2000 Dodge Durango 360, approx. 285hp @ crank
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09-03-2006, 08:58 PM
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#3 (permalink)
| | Junior Member
Join Date: Sep 2006 Location: california
Posts: 2
| is it possible
i have a 97 ford f350 dually with an automatic tansmission and 460 engine is it possible to put in a diesel into it? and if so with what engine should it be replaced with or where can i go to find out if i can? | |
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03-02-2008, 01:50 AM
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#4 (permalink)
| | Junior Member
Join Date: Mar 2008
Posts: 5
| MPG-CAP would help
Try the MPG-CAP which can get your engine burning octane 87 like getting same power of octane 91 because it burn more complete, plus it help run 10 to 15% more mileages also cut down 75% emission sure get test only smog check passed so easily. cost is $2.50 each for each 15 gallons fuel, my 97 v10 6.8L trial it for couple months and just pass the California Test only smog check last week without changing any parts nor oil | |
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