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  1. #1
    Member
    Join Date
    Jul 2009
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    36
    Location
    central coast Ca. near Avila Beach
    Tractor
    JD2305tlb JD3038e

    Default old 2 cycle mix

    I have been wondering how to deal with old 2 cycle gas mix, it seems that when I'm done with my chainsaw or other gas run small tool I have left over gas mix. Sometimes it may be 6 months before I need to use gas mix again, I have heard that the mix goes bad after 6 weeks and the old gas makes the equipment hard to start and run poorly, I have had these issues, I hate it when I have a large tree down in my drive and my saw won't start. My question is what to do with the old mix. I heard somewhere that you can put it into a full tank of gas in your truck and it will be dilute enough to run through without problem, I don't want to mess up my truck, so is it safe for my truck? What do other people do? Mark
    don't taze me bro

  2. #2
    Super Member bp fick's Avatar
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    Aug 2009
    Posts
    5,455
    Location
    Beaver Creek, Northern Michigan
    Tractor
    Kubota BX2360

    Default Re: old 2 cycle mix

    First, if you use a shot of Sta-bil when you mix it, it would be good for 9-12 months, which means not having to waste it. It's a good practice for snowblowers, string trimmers, chainsaws, outboards, etc. Mix very small (1 gal) cans to also eliminate waste.

    I would NOT burn it in a four stroke engine I cared about. Good starter for the burn pile.
    BP


    "Some chickens, some gardens and a Kubota."

  3. #3
    Silver Member
    Join Date
    Feb 2009
    Posts
    183
    Location
    NENC

    Default Re: old 2 cycle mix

    Quote Originally Posted by gasbag View Post
    I heard somewhere that you can put it into a full tank of gas in your truck and it will be dilute enough to run through without problem, I don't want to mess up my truck, so is it safe for my truck? What do other people do? Mark
    I have done that many a time. Some 2 stroke oils have a fuel stabilizer in them but it does not always seem to matter wether they do or don't it just goes bad anyway. You can safely add lets say 1 gallon of fuel to a tank, even 1/2 gallon of bad gas in a full tank will not be an issue. My F150 has 2 tanks 1 tank is nearly empty and the other is about 3/4 full. It could take me several more weeks to get to the point I need to fill one of my tanks. As you can see I am always running around with at least a few gallons of bad gas in the tank. Once it is mixed with fresh gas there really is no issue.

  4. #4
    Super Star Member Diamondpilot's Avatar
    Join Date
    Jan 2007
    Posts
    14,141
    Location
    Daleville, IN
    Tractor
    Jinma 254/284 Ford 861 Powermaster at work

    Default Re: old 2 cycle mix

    Quote Originally Posted by bp fick View Post
    First, if you use a shot of Sta-bil when you mix it, it would be good for 9-12 months, which means not having to waste it. It's a good practice for snowblowers, string trimmers, chainsaws, outboards, etc. Mix very small (1 gal) cans to also eliminate waste.

    I would NOT burn it in a four stroke engine I cared about. Good starter for the burn pile.
    It will not hurt a thing to burn it in a 4 cycle engine. For example I run a marine business and the new fuel injected Mercruiser and Volvo engines such as the 5.0L, 5.7L, 6.2L, and 8.1L engines call for this procedure to winterize the engine. (Fog)

    Remove fuel line for gas tank and hook to temp tank.

    Add 1 gallon gas, 13oz TCW3 2 stroke oil, and 1oz Stabil. This works out to a 10 to 1 mixture. 13 oz oil to 128 oz gas.

    Start engine and run at 1200 rpm's for 5 minutes then shut down.

    Reconnect fuel line to main tank.

    Change Fuel/Water separator.

    Any old fuel like you have that is left over at the end of the year I dump into my boats fuel tank, 100 gallons, then top it off with fresh fuel and Stabil for the winter.

    Chris

  5. #5
    Elite Member
    Join Date
    Feb 2002
    Posts
    3,777
    Location
    western,pa.
    Tractor
    Kioti DK 35

    Default Re: old 2 cycle mix

    Any old left over 2 cycle gas I always run it through my riding mower to use it up.
    I did that with my Wheel Horse garden tractor for years, never hurt it any. My Wheel Horse was 30 years old when I sold it and it still run great.
    Vince,
    Kioti DK 35
    Hustler Super Z

  6. #6
    Super Member bp fick's Avatar
    Join Date
    Aug 2009
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    5,455
    Location
    Beaver Creek, Northern Michigan
    Tractor
    Kubota BX2360

    Default Re: old 2 cycle mix

    I also have a boat, so any fuel "left over" can always be dumped into that tank, as it is merely a quart or less, as I do not mix 2 stroke in large batches.
    I understand fogging for winter of marine engines, both 2 and 4 strokes.

    But, in the absence of a boat tank, for me, and this just for me, I do not run it through 4 stroke lawn machines nor any automobile. I just won't go there. I won't bore you with the all the reasons why.

    Buy a boat, you will always have a place to get rid of it.
    BP


    "Some chickens, some gardens and a Kubota."

  7. #7
    Super Star Member Diamondpilot's Avatar
    Join Date
    Jan 2007
    Posts
    14,141
    Location
    Daleville, IN
    Tractor
    Jinma 254/284 Ford 861 Powermaster at work

    Default Re: old 2 cycle mix

    Quote Originally Posted by bp fick View Post
    I also have a boat, so any fuel "left over" can always be dumped into that tank, as it is merely a quart or less, as I do not mix 2 stroke in large batches.
    I understand fogging for winter of marine engines, both 2 and 4 strokes.

    But, in the absence of a boat tank, for me, and this just for me, I do not run it through 4 stroke lawn machines nor any automobile. I just won't go there. I won't bore you with the all the reasons why.

    Buy a boat, you will always have a place to get rid of it.

    What I was trying to say is these are very technical and advanced MPI engines and they run a 10 to 1 mix for winterizing so putting a 1/2 gallon of 40 to 1 mix from your saw in a 25 gallon tank of a average pickup is not going to hurt a thing.

    Chris

  8. #8
    Platinum Member
    Join Date
    Jan 2008
    Posts
    578
    Location
    SE Ohio & SE Florida

    Default Re: old 2 cycle mix

    Running old 2-stroke mix in a 4-stroke lawn mower won't hurt it if you don't go hog wild. Older Kohler singles actually run better with some in the tank if you stay at 100:1 or higher. Helps lube the exhaust/intake valves.

  9. #9
    Bronze Member
    Join Date
    Jun 2009
    Posts
    64

    Default Re: old 2 cycle mix

    Ask any old dirtbiker. Most of them have 4 stroke lawnmowers that have never seen regular gas. They always get the premix gas that was too old for the dirt bike. My pickup or van also burned premix very well.

  10. #10
    Veteran Member
    Join Date
    Aug 2008
    Posts
    1,003

    Default Re: old 2 cycle mix

    Quote Originally Posted by gasbag View Post
    I have been wondering how to deal with old 2 cycle gas mix, it seems that when I'm done with my chainsaw or other gas run small tool I have left over gas mix. Sometimes it may be 6 months before I need to use gas mix again, I have heard that the mix goes bad after 6 weeks and the old gas makes the equipment hard to start and run poorly, I have had these issues, I hate it when I have a large tree down in my drive and my saw won't start. My question is what to do with the old mix. I heard somewhere that you can put it into a full tank of gas in your truck and it will be dilute enough to run through without problem, I don't want to mess up my truck, so is it safe for my truck? What do other people do? Mark
    I would throw it in my cars...Been doing that for years and TC oil is great for a UCL...

    PS, I also have never used stabil in my backpack blower, gas trimmers, grass trimmer..Maybe I am lucky,

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