Results 1 to 6 of 6

terrible fuel mileage

This is a discussion on terrible fuel mileage within the General Help forums, part of the LSx Technical Help Section category; I have a 1998 E350 10 passenger van with a 7.3L power stroke diesel, the shop tells me that i ...

  1. #1
    Junior Member
    Join Date
    Jul 2007
    Location
    Agassiz BC Canada
    Posts
    2

    white
    1998 E350 Van/ 7.3L DL

    terrible fuel mileage

    I have a 1998 E350 10 passenger van with a 7.3L power stroke diesel, the shop tells me that i have a 3:55:1 gear ration rear end, I`m told the transmission is the only optimum 1 available it is a 3spd with 1 overdrive, we have 16 inch rims overall tire height is 29 inches, we get on the hiway 20mpg in town around 12mpg.
    how can we better our fuel mileage (eg: gear ratio, transmission, etc)

  2. #2
    !!!!!!!!!!!!!!!!!!!!!!!!! ATCharming's Avatar
    Join Date
    Jan 2007
    Location
    Rockford, IL
    Age
    25
    Posts
    8,303

    Silver
    2000 Camaro SS

    holy shit thats a big van!

    id say get a smaller gear ratio, but idk how hard itd be to drive that thing since its so heavy...

  3. #3
    Junior Member
    Join Date
    Jul 2007
    Location
    Agassiz BC Canada
    Posts
    2

    white
    1998 E350 Van/ 7.3L DL

    Hi there young person

    Quote Originally Posted by ATCharming View Post
    holy shit thats a big van!

    id say get a smaller gear ratio, but idk how hard itd be to drive that thing since its so heavy...
    I have a large family 7 children and the van is not that heavy, overall the weight of the van is only 1758 kg`s or 3800 lbs, compared to most cars that weigh in at over 2500 lbs and only hold 4 passengers, 10 passengers plus driver and only weighs in at 3800 lbs this is not heavy, compared to my semi-truck, and i can drive circles around most cars and their drivers because it is very easy to drive.

    now what gear ratio would you suggest that work well with ford vehicles (and yes i have heard the definition of FORD) ? please give me some suggestions.

  4. #4
    !!!!!!!!!!!!!!!!!!!!!!!!! ATCharming's Avatar
    Join Date
    Jan 2007
    Location
    Rockford, IL
    Age
    25
    Posts
    8,303

    Silver
    2000 Camaro SS

    Quote Originally Posted by Dennis McInroy View Post
    I have a large family 7 children and the van is not that heavy, overall the weight of the van is only 1758 kg`s or 3800 lbs, compared to most cars that weigh in at over 2500 lbs and only hold 4 passengers, 10 passengers plus driver and only weighs in at 3800 lbs this is not heavy, compared to my semi-truck, and i can drive circles around most cars and their drivers because it is very easy to drive.

    now what gear ratio would you suggest that work well with ford vehicles (and yes i have heard the definition of FORD) ? please give me some suggestions.
    3800 is not bad at all for that big of a van. wow

    i dont know about ford rear ends, but just something lower would be good. i dont think id go under 3.00 tho, or itd be really slow

  5. #5
    Senior Member
    Join Date
    Apr 2007
    Location
    Newport, RI
    Posts
    1,550

    Navy Blue Metallic
    '00 Formy A4

    A cheaper way to lower the gear ratio would be to add a slightly taller tire, if you have the room.

    Honestly though, 20mpg sounds pretty good for a vehicle that size. Weight aside, you're basically driving a huge brick down the highway. I have a hard time getting that with my 6 cylinder Grand Cherokee.

    Also, you need to weigh the investment with the possible return. If you spend 700 bucks on a gear swap to gain a mpg or two, how long will you have to drive to pay off that gear swap in fuel savings?

    Is the van in a good state of tune? Do you drive with a light foot. If you drive a bit slower, say keep it around 60mph on the highway, you should see some savings. All that will cost you is you'll arive at your destination a few minutes later.

    I'd check a diesel forum if I were you...there's a lot of guys making big power with PSD's, they have quite a following. I'm sure they could give you some pointers on getting better mileage.

  6. #6
    !!!!!!!!!!!!!!!!!!!!!!!!! ATCharming's Avatar
    Join Date
    Jan 2007
    Location
    Rockford, IL
    Age
    25
    Posts
    8,303

    Silver
    2000 Camaro SS

    yea hes right about the gear swap... ud have to think about how much ud be benefiting, and how long it'd take to make that money back...

    my bad. but yea. 20mpg is real good for that van... im in the teens with my camaro, and its stock.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. How to run your LS1 on E85
    By Runn_WS7 in forum External Engine
    Replies: 133
    Last Post: 02-13-2011, 08:29 AM
  2. got fuel pump replaced, now gas mileage is crap
    By chris5 in forum General Help
    Replies: 4
    Last Post: 06-25-2007, 08:40 AM
  3. Mitsubishi Fuel Door Mod Help Please
    By funlman in forum Appearance Section
    Replies: 0
    Last Post: 05-15-2007, 09:50 AM
  4. motor hesitates aroung 2500rpm
    By Garry in forum Internal Engine
    Replies: 25
    Last Post: 06-19-2006, 08:27 AM
  5. fuel mileage 06 lbz
    By Wyoming T/A in forum GM Trucks
    Replies: 3
    Last Post: 04-14-2006, 08:24 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •