So reportedly at house Depot in mine area, pre-mixed 2 bicycle fuel is in a grey bottle and also 4 cycle is in a eco-friendly bottle. And at Lowe"s, it"s precisely the opposite. The critical time i bought fuel, i bought in ~ the various other store and picked based exclusively on color. This means I have actually now run about 48 ounces that 4 cycle fuel with the engine of my 2 bicycle string trimmer. Ns know, stupid me because that not reading the label.

You are watching: Can you use 4 cycle oil in a 2 cycle engine

As i was making use of it today, that would avoid running if i let the idle. I assumed that to be weird however pressed on. Eventually it died while i was using it at full throttle. I have not been able come restart that at any kind of choke position. It"s currently cooling down in the garage.

Have i done permanent damages to the engine? What have to I do?


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There is rather the excessive possibility there has actually been permanent damages done. 4 bike engines do not require oil blended with the gas to provide lubrication, due to the fact that it has actually oil in the crankcase.Two bicycle engines need to have oil mixed in the gas to carry out the lubrication needed, since there is no oil in the sump. Once you supplied the 4 cycle gas, there was no much needed oil blended with the gas. There might be a small chance the engine has not seized, it might start again, however the life that the engine has actually been greatly reduced.


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As Jack said, you virtually certainly go permanent damage to the motor. The piston ran there is no oil for a very long time and also running that at complete throttle to be just around the worst thing you might have done. Also running the motor skinny on oil or fuel mix can and will damage a piston/cylinder. Believe me, I have done it v 2-stroke dust bikes.

When you traction the beginning cord perform you feeling much less resistance than you go before? I"ll bet yes, and also this is proof of the damage.

See more: Gone With The Wind Opening Line">Kit Whitfield"S Blog: First Sentences: Gone With The Wind Opening Line

You may obtain lucky and can discover a replacement cylinder and piston and also repair it there is no too much cost. Also a catastrophic failure choose this usually only affects the cylinder and also piston. Back the finish lack that oil may an extremely well have actually hurt the crank bearing as well.


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