This product cleaned my entire fuel system including the fine screen in my furnaces pump, very impressive. I add a bottle every time I get my heating oil tank filled.
Verified purchase: Yes | Condition: New
I have 2 oil tanks and the one tank had slow flow,used this 2 times and keeps oil flowing,ebay has good vendors on this and is worth the price.burner seems to run smoother tooi will continue to buy this great product
Verified purchase: Yes | Condition: New
Hot 4 in 1 certainly gave positive results. The furnace starts more smoothly with less rumble at start up and ignition. Overall the furnace seems to run quieter and more smoothly. It is hard to judge if I am using less fuel, but I would suspect it. I was pleased enough with the results last heating season that I have purchased the product again.
Verified purchase: Yes | Condition: New
I've been using it for a few years now, and the last furnace service the guy took out the tank filter (which was pink in color) and the filter was very clean.
Verified purchase: Yes | Condition: New
Have used this for years! KEEPS my furnace running like new! Great product!BobF
Verified purchase: Yes | Condition: New
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