Customer Ratings & Reviews

Product seems to be working. My temperature gage is showing 5 degrees cooler than it was running.

I did not know notice a change in warm up time or anything. If there was a change it was very minimal and not noticeable. My car never overheated before so there was no change at full temperature. Putting in my race car in the spring also so we will see. But as of now. Skip this one.

Now that it is winter I did a quick spill and fill with Amsoil car and light truck coolant with half a bottle of this. Car heats up faster and stays cooler in the summer. It works.

This is my first time to use Dominator Coolant Boost. In fact, the first time I have ever supplemented a coolant/water mix in over 40 years of car ownership. I recently acquired a 2016 Corvette Z06, a car known for overheating issues. I had the coolant replaced and had the shop add Dominator at that time. The initial returns are good, but based on very little true hard driving time. My comparison is the day of the service. I drove to the shop, about 30 minutes from my home by highway. The coolant temperature fluctuated above/below 200 degrees. Later in the day, taking the same roads but with a higher ambient outside air temperature, the car ran between 185 and 190 degrees. Definitely not a scientific testing method, but there was a difference.

Even my wife notices how much quicker her car warms up in the winter. I add the recommended amount to each of our family cars every fall. The cars warm up noticeably faster. Highly recommend.

This stuff flat out works. I’ve used Coolant Boost in at least a half dozen cars and trucks. In cold weather all the vehicles warmed up noticeably quicker. The science behind it is solid!!

Compatibility with all of the current types of coolant used in modern cars - always nice to have a bit of extra protection and potential performance.

Good stuff....use it in all our cars,especially the boosted (turbo) cars

Engine warms up faster in winter, and stays dead on thermostat temp during heat of summer (used to go up about 10 degrees idling with a/c on really hot days, which manual said was "normal")

After draining and flushing my coolant system, I noticed that my car ran alot smoother and warmed up up faster than usual, I am able to fly right off the bat

I’m seeing a difference of 10-15 degrees cooler temperatures in a 1 ton dually. 96 degrees outside and climbing a 6 percent was usually 215. Barely gets over 200 now.

Product does exactly what it says it does I immediately noticed the engine runs Much cooler!!

Temp was running at 210 degrees continuously. After adding Dominator Coolant Boost the temp dropped to 180 degrees across the rpm range. I have never found another coolant additive that was able to drop the temp by even 10 degrees. Dominator works great

This excellent product a real winner for here down south in over 100 degree weather.

Coolant Boost is a must add in all your vehicles. I’ve noticed instant results. I like the piece of mind even in newer vehicles as everyone knows heat is a killer to any engine.

I did a total flush and I added this product. To be honest, I did not see, hear or feel a difference. I will know more by winter season.

Every vehicle I used Coolant Boost in showed a noticeable difference in warm up time in cold weather. It gives me confidence that my engine is protected in hot weather.

And have had no problems and it does what it's supposed to do

Seems like the engine does warm up faster and run cooler.