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What grade gassoline?????

Discussion in 'Mechanic and Repair' started by mike lane lawn care, Jan 22, 2006.

  1. mike lane lawn care

    mike lane lawn care LawnSite Bronze Member
    Posts: 1,707

    here's and odd question, what grade gassoline should i run in an 18hp kohler engine? regular, mid grade, or high grade? and is it safe to put a small amount of STP gas treatment in every now and then? my engine has 2.2 hours on it and i would like to keep it in top condition from the start. thanks all.
  2. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799


    Through some fuel cleaner through once a seasion. A small engine like that will not take advantage of the anti knock abilities of high octane fuel.
  3. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    I second Jon's reply, Why people spend money on higher grade fuel for small engines is beyond me.
  4. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Posts: 3,503

    I use a product called ''Seafoam'' Its good for 2 and 4 cycle engines. Its a good cleaner and more industrial than STP. It can be found at most auto parts and small engine shops. In my area a 16 oz can sells for about 6 bux

  5. DEEJ

    DEEJ LawnSite Member
    Posts: 230

    I certainly have to agree on the question of grade. Regular unleaded. There is no advantage to using anything else.

    Being in cold country up here, I add a bit of gas line anti-freeze periodically to soak up any moisture, and add fuel stabilizer for the winter when the engines are not being used - that is all that is required, IMHO.

    As to why some people buy the higher grades of fuel for small engines: I think there is a perception that "more expensive" equals "better". This goes for anything we buy, but I think people fall into this trap a lot when it comes to gasoline (for everything, not just small engines). That old Ford Escort isn't getting any advantage from the hi-test fuel either, but I'll bet some use it and think it is helping. Think of the millions wasted in high grade fuel every year for engines that don't need it!

  6. mike lane lawn care

    mike lane lawn care LawnSite Bronze Member
    Posts: 1,707

    thanks for the input guys. without your advice i would have been wasting my money on mid-grade gas
  7. PLS-Tx

    PLS-Tx LawnSite Silver Member
    from Texas
    Posts: 2,385

    :blush: I have always used the middle grade because that is what the Dixie Chopper dealer told me to use.

    Looks like I could be saving some $$.
  8. Redneckn

    Redneckn LawnSite Senior Member
    Posts: 294

    I run regular unleaded in my machines and add Marvel Mystery Oil every now and again. Since mine gets run year round, we dont use stabilizer. But if it's to be parked for any amount of time I would for sure put it in the tank.

    JKOOPERS LawnSite Bronze Member
    Posts: 1,259

    i am not very comfortable putting anything in my gas or engines . besides the stabilizer.
  10. Redneckn

    Redneckn LawnSite Senior Member
    Posts: 294

    To each his own. I use the MMO because I've worked on this crap for so long and I know what can happen. Also, I've seen so many of them that did use the additives and never had real problems where fueling type things are concerned.

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