Testing Shows AMSOIL Dominator® Coolant Boost Outperforms Red Line Water Wetter®
Competitive testing comparing AMSOIL Dominator® Coolant Boost and Red Line Water Wetter® was conducted in an independent laboratory. The ASTM corrosion tests featured in this study are designed to simulate the most grueling conditions cooling systems face, and are the actual test standards the automotive industry relies upon for the approval of engine coolant products. Test results show Dominator Coolant Boost provides enhanced temperature reduction and corrosion protection properties compared to Red Line Water Wetter.
Temperature Reduction Dynamometer Test
To test temperature reduction capabilities, controlled engine dynamometer (dyno) tests were performed on a 350 cubic inch Chevy engine with an aluminum block and cylinder heads. In each phase of testing, the engine was operated at 4,500 rpm until coolant temperature stabilized. As benchmarks for the test, straight water coolant stabilized at 220ºF and a 50/50 antifreeze/water mixture stabilized at 228ºF.
| Temperature Reduction | Dominator Coolant Boost | Red Line Water Wetter |
| Mixed with 50/50 Water/Antifreeze | 6°F reduction | 3°F reduction |
| Mixed with Straight Water | 19°F reduction | 12°F reduction |
Cast Aluminum Alloys Corrosion Test
The Cast Aluminum Alloys Corrosion Test (ASTM D-4340) measures corrosion protection properties in modern automobile and high-performance race engines with aluminum cylinder heads. A cast aluminum puck was heated to 275°F at 28 PSI and exposed to the test coolant mixture for one week. Weight loss of less than 1.0 mg is required to pass the test.
| Allowable Weight Loss | Dominator Coolant Boost* | Red Line Water Wetter* | Water Only |
| < 1.0 mg | 0.14 mg | 0.21 mg | 3.97 mg |
* Mixed with straight water
Corrosion Test in Glassware
In the Corrosion Test in Glassware (ASTM D-1384), six metal coupons constructed of the most common metals in automotive cooling systems were totally immersed in aerated coolant mixtures for 336 hours at 190°F. Each test was performed three times to determine the average weight change for each metal. The ASTM sets the “allowable” weight loss maximums for each metal.
| Allowable | Dominator Coolant Boost* | Red Line Water Wetter* | Water Only | |
| Copper Weight Loss | 10 mg max | 1 mg | 1 mg | 25 mg |
| Solder Weight Loss | 30 mg max | 1 mg | 6 mg | 62 mg |
| Brass Weight Loss | 10 mg max | 0 mg | 2 mg | 23 mg |
| Steel Weight Loss | 10 mg max | 1 mg | 1 mg | 18 mg |
| Cast Iron Weight Loss | 10 mg max | 0 mg | 0 mg | 29 mg |
| Cast Aluminum Weight Loss | 30 mg max | 0 mg | 16 mg | 91 mg |
*Mixed with straight water
Simulated Service Corrosion Test
In the Simulated Service Corrosion Test (ASTM D-2570), six metal coupons constructed of the most common metals in automotive cooling systems were exposed to ASTM corrosive water designed to simulate hard and corrosive water in degraded coolant for 1,064 hours at 190°F. Coolant was maintained at a temperature and flow rate equivalent to the operating conditions seen in most passenger vehicles. Corrosive weight loss suffered during the test determines the additive’s corrosion protection properties. The ASTM sets the “allowable” weight loss maximums for each metal.
| Allowable | Dominator Coolant Boost* | Red Line Water Wetter* | Water Only | |
| Copper Weight Loss | 20 mg max | 7 mg | 6 mg | 66 mg |
| Solder Weight Loss | 60 mg max | 0 mg | 25 mg | 120 mg |
| Brass Weight Loss | 20 mg max | 3 mg | 5 mg | 59 mg |
| Steel Weight Loss | 20 mg max | 0 mg | 4 mg | 54 mg |
| Cast Iron Weight Loss | 20 mg max | 0 mg | 2 mg | 117 mg |
| Cast Aluminum Weight Loss | 60 mg max | 0 mg | 34 mg | 89 mg |
*Mixed with straight water
