Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Display Modes
Old 09-30-2009, 09:59 PM   #11
Senior Member
JoeyNick's Avatar
Join Date: Apr 2007
Location: New "Yawk" City
Posts: 245
Re: Better gas mileage

I recently got my best fuel mileage EVER. Driving from Virginia Beach, VA to Lewes, DE I averaged 21.2 MPG. Yes, 21.2 MPG.

The drive is entirely at sea level (no hills) and there were very few stops along the way. Also, I have the 6.0 diesel reprogrammed with my SCT LiveWire (for Economy), a 3.55 rear end, stock size tires, 2 wheel drive (ok, ok, 1 wheel drive) and drive with a very light foot. My speed varied between 45 and 65 mph.

Oh, I have about 70k on the odometer.

2005 Ford E-350 Diesel Sportsmobile
EB 102 Voyager top, 3.55 rear, Mobil 1 all around
270 amp alternator, billet water pump, coolant filter kit,
aluminum radiator, X-Monitor with pyro, trans temp, boost
+ Scan Gauge & SCT Live Wire (Economy)
JoeyNick is offline   Reply With Quote
Old 10-05-2009, 05:37 PM   #12
Join Date: Apr 2007
Location: San Diego
Posts: 60
Re: Better gas mileage

Originally Posted by Ford_6L_E350
The gear ratio you have can affect mileage, but usually not much. The power needed to go a given speed doesn't change and it takes about the same fuel to make the same power.

But, to clarify the gear ratio question, can you tell us how many RPM's you turn at 60mph? We can figure the gear ratio from that.

Hi Mike, My van turns about 1850 RPMs at 60mph.

jrtozer is offline   Reply With Quote
Old 10-05-2009, 06:49 PM   #13
Senior Member
Ford_6L_E350's Avatar
Join Date: May 2007
Location: Washington - Ridgefield
Posts: 4,727
Re: Better gas mileage

1850 rpm @ 60 mph sounds like a 4.10 final drive and 32-33" tall tires. My van has 33" tall tires and 4.10 gears and turns about 1800 rpm at 60 mph.

The 4wd conversion (4" lift and more weight) cost me about 1mpg. Steady 60 mph cruise on level ground can return 22-23mpg for me. Unfortunately, I have start up, get up to speed, go up hills, stop at lights, etc. My best tank ever was 19.8mpg. Throw in some off road and the mileage drops into the single digits.

None of us bought a 4wd SMB to save money or fuel. Unless it was a Sprinter.

Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper
Ford_6L_E350 is offline   Reply With Quote
Old 10-05-2009, 10:51 PM   #14
Senior Member
dave_in_delaware's Avatar
Join Date: Apr 2008
Location: Gap, PA
Posts: 245
Send a message via Yahoo to dave_in_delaware
Re: Better gas mileage

Originally Posted by JoeyNick
... Driving from Virginia Beach, VA to Lewes, DE ....
Aww, man! You drove right past me! I would have loved to meet you and check out your SMB.

Sounds like great MPG, too!


Homebuilt RV Project: Design Phase is 80% Complete! (but on hold until I win the lottery)
Ford E-350 EB w/ Cruiser Top, Flip-down "Gaucho" sofa/bed, custom cabinets, AGM batteries, solar panels, water heater, fresh/gray water tanks, sink, porta-potty....
dave_in_delaware is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 03:13 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2023, vBulletin Solutions, Inc.