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Thread: 2 cycle ratio to diesel fuel for older diesels?

  1. #1
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    Question 2 cycle ratio to diesel fuel for older diesels?

    I had asked this in the fuel forum no answer so asking here.

    What is best ratio for using 2 cycle in diesel fuel as lube?
    99 GMC SUB, 2500, 4x4, 6.5 TD (F) #H32 enhanced blk, Phaser timing set, B&D IC, 3" ATS exh, K&N w/prefilter, 4WD NVG 246, 4L80E kevlar Transgo off road/tow mods/B&M supercooler, 14 FF MagTec w/locker 3.42:1, 9.25" IFS frt/diff 3.42:1 w/ARB locker, AutoMeter Boost & pre-turbo pyro meter, 12,000 lb hydro winch, Warn classic bumper w/brushguard & diesel scoop, Max E-torq Stage 3, hi pop inj, oil bypass sys, on board air comp for front ARB locker & tire inflation, DynaView driving/auto-cornering lts, DZ nerfs, A/T 285/75/16 SilentArmor 3750 lb rated on 3750 lb rated Alcoa, 3 IP drivers 2 r spares.

  2. #2
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    Nobody really knows. The ONLY data I have ever seen on 2 cycle oil is the lubricity study over on the place for what the wear scar tells ya. They ran the test at 200:1. All the rest is personal opinion including mine.

    I tried it about there and a little leaner. I like it a little leaner maybe 384:1 It seemed to retard combustion on start up when it was richer. The truck seemed to run well on it once warm.
    97 5spd K2500 Ext Cab short Bed ~160K miles.
    TM, 3" downpipe & 4" exhaust, remote FSD, remote oilfilter, Gauges: EGT, Boost, Fuel Pressure, B&W Gooseneck Turnover ball, Prodigy Brake Controller. Hi-Temp Hydraulic Oil Cooler Lines.

  3. #3
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    My personal experience is that my engine seems to like about 1/2oz per gallon (256:1 for those of you who are into ratios). 1/4 oz didn't seem to do much, and anything more didn't give me any more benefit.
    1987 Jeep Grand Wagoneer...new 6.5 in process...diamond block, 18:1's, other goodies...


  4. Default

    I found this forum and figure what the heck...

    Well the ratio I've been using now since I start is 128:1 ratio for the older Cummins... 1st and 2nd gens. This will get you back to the lubricity level of the LSD which was between 350-450 HFRR.

    The test diesel place did was at 200:1 ratio and it didn't get the HFRR back to where it should be with poor ULSD which was 636 HFRR (474 HFRR after the test)

    So for us older truck I would suggest 128:! ratio (1 oz of oil to 1 gallon of fuel)

    Link to my 2 cycle oil page...
    http://mopar.mopar1973man.com/2002%2..._cycle_oil.htm

    Lots of good reading here...

  5. #5
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    Thumbs up Thanks

    Quote Originally Posted by Mopar1973Man View Post
    I found this forum and figure what the heck...

    Well the ratio I've been using now since I start is 128:1 ratio for the older Cummins... 1st and 2nd gens. This will get you back to the lubricity level of the LSD which was between 350-450 HFRR.

    The test diesel place did was at 200:1 ratio and it didn't get the HFRR back to where it should be with poor ULSD which was 636 HFRR (474 HFRR after the test)

    So for us older truck I would suggest 128:! ratio (1 oz of oil to 1 gallon of fuel)

    Link to my 2 cycle oil page...
    http://mopar.mopar1973man.com/2002%2..._cycle_oil.htm

    Lots of good reading here...
    Having 3 different diesel trucks 94 cummins ram 3500, 99 gmc k2500 6.5td, 00 ford 7.3 f350 this answer helps decide an issue if not otherwise addressed would cause major PITA w/o 2 cycle.
    99 GMC SUB, 2500, 4x4, 6.5 TD (F) #H32 enhanced blk, Phaser timing set, B&D IC, 3" ATS exh, K&N w/prefilter, 4WD NVG 246, 4L80E kevlar Transgo off road/tow mods/B&M supercooler, 14 FF MagTec w/locker 3.42:1, 9.25" IFS frt/diff 3.42:1 w/ARB locker, AutoMeter Boost & pre-turbo pyro meter, 12,000 lb hydro winch, Warn classic bumper w/brushguard & diesel scoop, Max E-torq Stage 3, hi pop inj, oil bypass sys, on board air comp for front ARB locker & tire inflation, DynaView driving/auto-cornering lts, DZ nerfs, A/T 285/75/16 SilentArmor 3750 lb rated on 3750 lb rated Alcoa, 3 IP drivers 2 r spares.

  6. #6
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    Thumbs up About a month now

    The 2 cycle has been great plan to keep running it......................................
    99 GMC SUB, 2500, 4x4, 6.5 TD (F) #H32 enhanced blk, Phaser timing set, B&D IC, 3" ATS exh, K&N w/prefilter, 4WD NVG 246, 4L80E kevlar Transgo off road/tow mods/B&M supercooler, 14 FF MagTec w/locker 3.42:1, 9.25" IFS frt/diff 3.42:1 w/ARB locker, AutoMeter Boost & pre-turbo pyro meter, 12,000 lb hydro winch, Warn classic bumper w/brushguard & diesel scoop, Max E-torq Stage 3, hi pop inj, oil bypass sys, on board air comp for front ARB locker & tire inflation, DynaView driving/auto-cornering lts, DZ nerfs, A/T 285/75/16 SilentArmor 3750 lb rated on 3750 lb rated Alcoa, 3 IP drivers 2 r spares.

  7. #7
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    Thumbs up 2 Cycle rocks

    My 6.5td can't be happier and using it in my 12 valve cummins, and 2000 7.3 powerstroke.

    Perhaps, other's using it can give an update as to how they like, or dislike 2 cycle added to diesel................
    Last edited by DA BIG ONE; 02-22-2008 at 04:17. Reason: typo
    99 GMC SUB, 2500, 4x4, 6.5 TD (F) #H32 enhanced blk, Phaser timing set, B&D IC, 3" ATS exh, K&N w/prefilter, 4WD NVG 246, 4L80E kevlar Transgo off road/tow mods/B&M supercooler, 14 FF MagTec w/locker 3.42:1, 9.25" IFS frt/diff 3.42:1 w/ARB locker, AutoMeter Boost & pre-turbo pyro meter, 12,000 lb hydro winch, Warn classic bumper w/brushguard & diesel scoop, Max E-torq Stage 3, hi pop inj, oil bypass sys, on board air comp for front ARB locker & tire inflation, DynaView driving/auto-cornering lts, DZ nerfs, A/T 285/75/16 SilentArmor 3750 lb rated on 3750 lb rated Alcoa, 3 IP drivers 2 r spares.

  8. #8
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    South Russell, Ohio
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    I monkeyed around with ratios with my 96 Burb 2500 and found that 1/2 oz per gallon was the ticket for me. I also run power services. I am a firm believer in the two cycle. My truck runs significantly better when it is in the tank.

    There is a thread in here somewhere where somebody suggested just trial and error running ratios until you started to get the classic 2 cylce smoke out the tail pipe then back it down a bit from there.

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