Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Poor results

I had to return this item twice and both times it kept shutting off because of oil coming out of the oriface. Finilly they gave me another one and it did it also. I also returned another one for someone else and they were having the same trouble. We bought fuel from three different places and the same thing happened.Both units would run out of fuel on the small cyl. in about 3 hours. A 20 lb. cyl. would only last 3 days.If your trying to heat a small shop with this there's a fire hazzard if there's saw dust and if any type of air born sprays are used, such as paint, WD40. Poly then it should not be used. It burns the spray and form a noxic smelling gas.