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  1. #1
    VIP Member VIP Member racer-x6's Avatar
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    Putting motor oil in a diesel fuel tank

    Someone said to put a quart of motor oil in every tank of Diesel, any truth or benefit to doing this?
    35 FOUNTAIN and 30 Spectre

  2. #2
    Platinum Member Platinum Member seafordguy's Avatar
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    Quote Originally Posted by racer-x6 View Post
    Someone said to put a quart of motor oil in every tank of Diesel, any truth or benefit to doing this?
    I have read about people putting in 2 stroke oil to help lubricate the injectors. I am sure it would lead to increased fuel filter changes.

    I also know that a lot of people put hundreds and hundreds of thousands of miles on Diesel trucks without doing this so who knows if there is any real discernable benefit?

  3. #3
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    you runnin a ford with the HUEI system. (6.0,7.3) if so trans fluid is better. it can help lube the fuel side of the injectors and dilutes well in diesel fuel. I have an old 7.3 IDI party bus that has at least a half tank of trans fluid and the rest diesel. it gets 23mpg with 20 people in it and a bus driver with a lead foot. i have ran as much as 50% used trans fluid in my 6.0 without any problems. MPG falls off but its free. I work at a ford dealer and i will just empt the flush machine in my fuel tank. If you are running a common rail system i dont see much benefit. but mabye some of the cummins guys can chime in on that subject.

  4. #4
    VIP Member VIP Member racer-x6's Avatar
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    Quote Originally Posted by Fixxxer22 View Post
    you runnin a ford with the HUEI system. (6.0,7.3) if so trans fluid is better. it can help lube the fuel side of the injectors and dilutes well in diesel fuel. I have an old 7.3 IDI party bus that has at least a half tank of trans fluid and the rest diesel. it gets 23mpg with 20 people in it and a bus driver with a lead foot. i have ran as much as 50% used trans fluid in my 6.0 without any problems. MPG falls off but its free. I work at a ford dealer and i will just empt the flush machine in my fuel tank. If you are running a common rail system i dont see much benefit. but mabye some of the cummins guys can chime in on that subject.
    no, just a 04 Duramax.
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  5. #5
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    I know alot of guys that run the two-stroke. They have clamed better milage, less smoke and a quieter engine. Some also run a mixture of Power Service and two-stroke.

  6. #6
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    Quote Originally Posted by Run_em_hard View Post
    Some also run a mixture of Power Service and two-stroke.
    been running my 7.3's that way for quite a long time, even before the advent of ULSD. Use a high-quality two-stroke ASHLESS oil. Not sure about smoking less-- I can lay a cloud if I put my foot in the chip, but it can quiet a 444 down a little, and helps lubricate the injectors. Eight ounces/10 gallons is plenty. Power Service is good stuff, if for nothing more than increasing the cetane number.
    Lot of voodoo juices out there for diesel fuel- I use to run anything I could get my hands on (including 5606 hyd oil) when I was running free Jet A in all of my diesels. Transmission fluid? nahhh. Best stuff for lubricity these days is bio, if you can get your hands on it......

    Good study here.....

    http://www.dieselplace.com/forum/sho...d.php?t=177728

  7. #7
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    I run 3oz of automatic transmission fluid in my old 85 Chevrolet with a 6.2 diesel. Its still running today on the farm. It doesn't pull very well and is hard on 700r4 transmissions but, it has over 600,000 miles on it and is on its 4th injection pump.

  8. #8
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    After taking the advice I saw here, I started running used tranny fluid from our shop in my tank and didnt notice much difference other than the tailpipe being easier to clean after pushin the chip hard on long tows..

    Ill keep doin it though!

  9. #9
    Platinum Member Platinum Member outriggers's Avatar
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    I run 1oz per gal of wal-mart 2 cycle in all my diesel stuff. I worry about the pumps with the ulsd diesel. Its so dry they add lube to the fuel so it doesn't wipe out the pumps. One batch with the lube missing makes for a bad day. I used to use Marvel M oil, but read a test where 2 cycle was better and cheaper. Always heard about using ATF but worry about turning the fuel Red. Doug
    JC Performance Engines


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