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  1. #1
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    Question Add Motor Oil to Fuel, or?

    Had a sticking injector someone pointed to the new fuels as the reason then suggested 2 quarts of motor oil to a tank to unstick the injector and keep using motor oil as a fuel lube. Injector has been fine and I have been adding motor oil to fuel since situation.

    Been using name brand cetane boosters and fuel lubes/cleaners and wonder now If ashless 2 stroke or just plain ole motor oil is better as fuel 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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    Arrow

    I won't take a side on the "oil in fuel" argument, but if you are going to add oil, use 2 cycle oil. It's formulated to burn in the combustion chamber. Motor oil has additives that are not designed for this purpose. A lot of folks use it this way, but the long term effects are unclear. I've used motor oil for corrective/diagnostic reasons, but wouldn't use it on a regular basis.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3

    Default

    At what ratio would you recommend for un-sticking a hanging injector? I'll use 2-cycle...1 quart per 50 gallons? 30? 10?
    2011 Chevrolet Tahoe 5.3L daily driver
    • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
    • Total GM diesel miles to date : ~950K

  4. #4
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    Default Ratio? Serious thought needed

    I used 2 qts 30wt for 43 gals; Everyone in these parts are stating ashless 2 stroke oil is best way to go but stumped as to at what ratio?

    I'm concerned as I was using well known brand name diesel fuel additive products when injector stuck.
    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.

  5. #5
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    Arrow

    Quote Originally Posted by DA BIG ONE View Post
    I used 2 qts 30wt for 43 gals; Everyone in these parts are stating ashless 2 stroke oil is best way to go but stumped as to at what ratio?

    I'm concerned as I was using well known brand name diesel fuel additive products when injector stuck.

    It's more likely the "stuck" injector needed the viscosity improvement more than lubrication. Sounds like it's wearing/worn out, or you got a sloppy reman. The same thing works for tired IP's.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  6. #6
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    Default

    After playing with ratios using 2-stroke, about 1/2oz per gallon seems to be working good for me. Anything less, and I don't see any benefit, and I didn't see any difference between 1/2 oz and 1 oz.
    1987 Jeep Grand Wagoneer...new 6.5 in process...diamond block, 18:1's, other goodies...


  7. #7
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    Default Viscosity

    Quote Originally Posted by DmaxMaverick View Post
    It's more likely the "stuck" injector needed the viscosity improvement more than lubrication. Sounds like it's wearing/worn out, or you got a sloppy reman. The same thing works for tired IP's.
    They were reman and some had different numbers was told they were all modified to hi-pop specs. Judging from your well informed and expert input on viscosity I'm looking at getting new injectors soon..............................
    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.

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