gas in diesel tank Kioti 3520

   / gas in diesel tank Kioti 3520 #1  

nitogranados

New member
Joined
Mar 15, 2025
Messages
5
Tractor
Kioti 3520
accidentally put about 6 ounces of gasoline in a nearly empty tank. I did not start it. I drained the tank from the hose that connects to the filter housing.
I flush again with about half gallon of fresh diesel.
I started and ran it, and it sounded funny so I decided to flush the entire system again and change the fuel filter and purged the fuel injector lines and the fuel pump.
Could a little bit of gasoline residue doing any damage? I did not run it with gasoline.
 
   / gas in diesel tank Kioti 3520 #2  
I wouldn’t think that small amount would hurt anything. It’s possible everything you did cleaned things out and broke some crap loose but I’d think the filter would have caught it.
 
   / gas in diesel tank Kioti 3520
  • Thread Starter
#4  
I wouldn’t think that small amount would hurt anything. It’s possible everything you did cleaned things out and broke some crap loose but I’d think the filter would have caught it.
it’s only got 54 hours, i was suprised how dirty the fuel filter was nonetheless.
The main issue that I’m having is about after 5 to 10 minutes of running the engine tone changes like I put a second muffler on the exhaust.
that hasn’t happened before the incident
 
   / gas in diesel tank Kioti 3520 #5  
The change in the sound of the motor probably has more to do with the filter change than the gas if all you put into it was 6 ounces. Had it been my tractor, I would have merely topped off the fuel tank completely with diesel and ran it out. If more than 6 ounces, I would have filled the tank with diesel, then siphoned it out, and refilled with fresh diesel. I would have used the mixed gas/diesel over time by filling the tank when it got to 3/4, thereby keeping it from running too lean a mixture.
A little gas will mix with the diesel and allow it to burn a little hotter, sooner ignition on the compression stroke, so if it starts knocking with pre-ignition sounds, that would be a problem. Six ounces of gas diluted to a tank full of fresh diesel probably won't make a bit of difference.
Changing the fuel filter would not have been something I would have done at this point, as that just adds to the number of things that can change things, and at the time of running gas/diesel mix... you don't want any outside influence on what is happening. The gas won't hurt the fuel filter, in fact probably won't even be affected by it. Once I got a couple tanks of fresh fuel run through the tractor, I would probably service the tractor just so I could look at the filter.
David from jax
 
   / gas in diesel tank Kioti 3520 #6  
Prior to retirement, I worked at a local Freightliner / Western star dealership and we had many Fed-Ex trucks come in where the drivers put gas in the diesel tank and unless they were driven any length of time, all we did was drain the gas out, replace it with diesel and let them idle for a while until the gas was all out of the systems and sent them on their way, Now if they ran them on gas for any length of time, that was a different story and ended up being a costly adventure.

I little gas (so long as you topped the tank off with diesel), won't impact anything.
 
   / gas in diesel tank Kioti 3520 #7  
I made the mistake before. I added several gallons.
I forget the ratio but you add motor oil to enrich the fuel.
6oz? maybe an oz?
On a full tank I don't see it doing any damage.
My tractor survived no issues.
 
   / gas in diesel tank Kioti 3520 #8  
I qualify I’m no expert on this. I’ll tell you what I don’t know. Do the two mix; or will the gasoline go to the bottom and get to the motor all at once. I would get it out if possible.
 
   / gas in diesel tank Kioti 3520 #9  
6 oz?

The concern is not worth the post!

The solution to pollution is dilution.

Fill the tank with fuel and call it good!

eta

How does "octane" effect "cetane"?
 
   / gas in diesel tank Kioti 3520 #10  
I probably would not worry about 6 ounce either. But like someone else said, diesel and gas do not mix and will separate. Diesel is denser and will sink to the bottom. If you let a can of mixed fuel sit you might be able to skim the gas off the top.
 

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