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!!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
4 star rating
A Little Extra Protection
By 
DON, 
a 
Verified Buyer 
from 
Sugar Land TX 
on 
September 14, 2021
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.
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
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Works as advertised.
By 
BRIAN, 
a 
Verified Buyer 
from 
Western Colorado  
on 
August 17, 2021
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.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Amsoil Fan
By 
MYRON, 
a 
Verified Buyer 
from 
Western Pennsylvania  
on 
August 09, 2021
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
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Top quality
By 
LEONARD, 
a 
Verified Buyer 
from 
EL Paso , Texas  
on 
July 10, 2021
This excellent product a real winner for here down south in over 100 degree weather.
Was this review helpful?
5 star rating
Excellent product
By 
JR, 
a 
Verified Buyer 
from 
New Jersey  
on 
July 03, 2021
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.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Cool collant
By 
SIR JIMMY, 
a 
Verified Buyer 
from 
Orrville 
on 
July 02, 2021
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.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
It Works!
By 
MICHAEL, 
a 
Verified Buyer 
from 
Western Wisconsin  
on 
June 12, 2021
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.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
I've Been Using Coolant Boost for quite a few Years
Free Shipping on orders of $100 US ($130 CA) or more.
Birthday Gift of a $5 coupon to help celebrate your day.
$5 Back with every $100 you spend.
Exclusive Offers throughout the year.
Free Membership renewal when you spend $500 or more.
Plus, Preferred Customers receive the quarterly AMSOIL Magazine with the latest product details, technical information and complete product catalog. Learn More >
Special Offers
Your browser is outdated.
Thank you for visiting www.amsoil.com. Certain parts of this website may not function with Internet Explorer. To continue shopping with us, please update your browser using one of the options below.