You are in a nightmarish situation and should seek legal
counsel. Sugar in a gasoline tank is basically harmless as Gordo pointed out. Sugar of any kind in your oil is catastrophic and will destroy the engine in less than 30 minutes of running time. There was a book published in the 70's called, "The Monkey Wrench Gang," which is the story of some eco terrorists. Great book by the way. One of the things they do is pour Kayro syrup in the oil of construction equipment
. It destroys the engines as indicated. In real life, it works the same way, but any sugar will do. As the oil heats up the sugar first melts, then burns which forms carbon which in turn destroys your engine. This is a hugely serious situation you are in. Even small amounts of sugar will cause the engine to fail and will require a complete re-build. The engine should be completely flushed extensively. I would hand crank it with the injectors removed to be sure the flushing
solution permeates the entire lubrication system, then I'd drain and do it again, and yet again. Once you have clean oil and new filters installed, I'd run the engine for just a few minutes and change the oil and filters yet again. You can't be too careful here. I've very serious, if you are not very, very careful your engine will be destroyed.
How do I know this? In the mid 70's when the book came out a group of native American thugs poured Kayro syrup in all the motors of all the air planes sitting at the airport
in Tuba City Arizona. I was the first unlucky chap to fly. My engine seized after about 15 minutes of operation necessitating a dead stick landing. Insurance
covered the cost of the re-build, but the penny wise, pound foolish insurance
company did not want to pay to have the plane move to a proper facility and did not want to pay for a completely new engine. They sent up a mechanic
with a short block in the back of his pick up truck, who proceeded to swap out the short block utilizing all the other components off the ruined engine, including the prop governor. He rinsed everything with solvent before re-assembling. No facilities at Tuba City at the time, so he just laid out a tarp and went to work. When he finished, we ground ran the engine for a few minutes and went for a very short flight. He went home, I got up the next day to fly to Phoenix. En-route, the prop governor failed, the engine seized on final. Cause? Contamination from sugar in the oil from the first engine made it into the new engine! In the end, I got a new engine out of the deal and didn't die. None-the-less the situation could have had a tragic ending, but I was lucky that day.
Treat this situation in a very serious manner, or buy a new engine. For sure talk to an attorney because no matter what you do, it's going to cost you some serious money
. Also, don't forget to check the gear
to be sure it was not tampered with as well.
Best of luck to you, you'll need it.