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ComStar’s Super Heat has been a trusted solution for over 45 years, offering comprehensive care with 8 treatments in 1. It supports smooth operation by melting ice, lowering the pour point, managing waxing and jelling, reducing water, dissolving sludge, cleaning parts, minimizing soot, and helping protect against rust.
Fuel treatments are essential for maintaining fuel system performance. Over time, impurities like carbon and water can accumulate, affecting efficiency. Regular use of Super Heat helps reduce these issues and supports consistent operation.
In colder climates, fuel can thicken, potentially impacting flow. Super Heat helps maintain optimal performance in low temperatures, ensuring fuel systems operate effectively throughout the year. Add 8 oz. with each 275-gallon refill to keep systems running smoothly.
Thomas Higgins
Reviewed in the United States on March 1, 2025
Good stuff
Abraham R.
Reviewed in the United States on February 22, 2025
We have an old furnace so I'm surprised at how well this works. It's worth the buy and I'll definitely be repurchasing again.
zombie187
Reviewed in the United States on February 21, 2025
Have used this product twice this season so far. Furnace runs quieter, and no odors from application. Highly recommended
Kathy
Reviewed in the United States on October 16, 2024
Our oil boiler is still running without any issues. Definitely will buy again.
John A.
Reviewed in the United States on February 4, 2023
I have an outdoor 275 gallon tank at my shop. I had an issue earlier in the year with the feed line freezing solid around Christmas in single digit weather. I was using diesel anti gel, many different types over the years, and the line still froze, although I will admit the oil was delivered in March 2022. I refilled the tank soon after, but we have been having unseasonably warm weather. The forecast was calling for single digits last night, so I added a bottle of 8 in 1 to a half tank (150 gals) Last night we dropped to 5 with a -20 windchill. I stopped in today to find the shop warm. Fired up without at problem at 20 degrees outside. I will continue to use this as long as I have oil heat! Definitely recommended
William J. Prah
Reviewed in the United States on October 29, 2022
I've been using this product for the past 7 years. Just one bottle, treats a 275 gallon tank of oil. It helps stabilize the oil, eliminate water, kills sludge and bacteria (mold and slime), and has kept my oil flowing smoothly from the tank to the furnace all this time. I don't start the heating season without it!
Viendoto'
Reviewed in the United States on February 20, 2019
My burner and filter previously, on occasion would get clogged with sludge and require a blowout to return to normal. This usually happened when I had a little less than a 1/4 tank. The boiler would run for 3-5 minutes, then gurgle and shutoff. Last heating season I started putting 1/2 a bottle of Comstar super heat in at a 1/4 tank. I stick the tank and usually can feel the sludge on the bottom; currently, I’ touching the bottom and no sludge feeling. Burner has been running fine and I use about 4 once’s prior to each delivery. Could cost less, but so far seems to do the job. Followup: Super Eight continues to keep sludge and or water from compromising my burner; I’ve conducted water paste teste since using and there is no evidence of water.: When I stick the tank , I touch bottom?(metallic bottom sound) , no sludge feeling. Unfortunately, I was about to buy again, but even though the advertised price is $12.07which should cost 36.96 is suddenly $33 and change. I’ll look elsewhere
gobdeep
Reviewed in the United States on October 25, 2019
Update 1 year later: it's that time of the year again. Leaves are changing colors, nights are cool in the mid 40's, and my heating system is coming back to life after many months of hibernation. I used another bottle of this at the start of fall and once every two or three fill ups. I am still impressed by this product and it is keeping our heating system in tip-top shape.Original review: I had a clogged filter and, while waiting for my new filter to arrive, tried a bottle of this in my heating oil (diesel) tank. Wow! What a difference. My entire filter looked brand new. Completely impressed after just one use. I’ll be using this product regularly from now on.
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