AMSOIL DOMINATOR Coolant Boost
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Enhanced Heat Transfer and Corrosion Protection
AMSOIL DOMINATOR Coolant Boost is formulated with proprietary tiered-surfactant technology that provides quick and effective heat transfer inside radiators and cylinder heads, resulting in significantly reduced engine warm-up times, lower engine operating temperatures and increased engine efficiency and horsepower.
It also contains a robust mixture of corrosion inhibitors that protect the radiator, heater core, water pump, cylinder heads, engine block and intake manifold from the damaging effects of corrosion.
Key Benefits
- Reduces engine temps up to 25°F (14°C) with straight water
- Helps vehicles warm up an average of 54% faster
- Proprietary tiered-surfactant technology for effective heat transfer
- Robust corrosion inhibitors protect all six common automotive metals
- 0.06 mg aluminum weight loss vs. 3.97 mg for water only (ASTM D4340)
- Works with straight water and antifreeze mixtures
- Increases horsepower by reducing parasitic heat
- Easy pour-in application — no draining required for antifreeze mixtures
Proven Temperature Reduction
In controlled dynamometer tests on a 350 cubic-inch Chevy engine with aluminum block and heads:
- With 50/50 antifreeze/water: reduced stabilized temperature by 8°F (4.5°C)
- With straight water: reduced stabilized temperature by 25°F (14°C)
In warm-up testing at 30°F (-1°C) ambient, DOMINATOR Coolant Boost helped the engine reach 180°F in 5.3 minutes vs. 11.4 minutes — an average of 54% faster warm-up.
In the ASTM D4340 cast aluminum corrosion test, DOMINATOR Coolant Boost showed just 0.06 mg weight loss vs. 3.97 mg for water only. In the ASTM D1384 glassware corrosion test, it protected all six common automotive metals well within ASTM limits.
Industry Certifications & OEM Approvals
Corrosion Protection
- ASTM D4340 (Cast Aluminum), ASTM D1384 (Glassware), ASTM D2570 (Simulated Service) — all Pass
Applications & Dosage
Use in racing applications using straight water as coolant and automotive applications using antifreeze mixtures.
Dosage: Straight water — 2 fl. oz. per quart of system capacity. Antifreeze mixtures — 1 fl. oz. per quart of system capacity.
Frequency: Straight water — drain, refill and add Coolant Boost once per year. Antifreeze mixtures — add once per year or every 30,000 miles (48,280 km).
Pros and Cons
Pros
- Reduces engine temps up to 25°F (14°C) with straight water
- Helps vehicles warm up an average of 54% faster
- Proprietary tiered-surfactant technology for effective heat transfer
- Robust corrosion inhibitors protect all six common automotive metals
- 0.06 mg aluminum weight loss vs. 3.97 mg for water only (ASTM D4340)
- Works with straight water and antifreeze mixtures
- Increases horsepower by reducing parasitic heat
- Easy pour-in application — no draining required for antifreeze mixtures
Cons
- Premium Investment: Higher initial cost compared to conventional or "shelf-brand" synthetic oils.
- Limited Local Retail: Primarily available through authorized dealers and specialized synthetic outlets. National Synthetics is a local stocking dealer. Call 1-678-944-8816 to confirm in-stock items for same-day local pickup.
Order Through Your Independent AMSOIL Dealer
Reduce your engine temperatures and protect against corrosion. As your Independent AMSOIL Dealer, we provide expert guidance and competitive pricing on all AMSOIL products.
Independent AMSOIL Dealer #1858536
Shipping & Returns
Fast, Reliable Shipping
- Free standard ground shipping on orders of $100 ($130 in Canada) or more.
- Orders under the threshold ship for a flat $9.99 ($12.99 in Canada) freight charge.
- In-stock items typically delivered in two to three business days.
- U.S. and Canada only — no shipments to PO Boxes.
30-Day Return Policy
- Return unopened, currently marketed products within 30 days for a full refund (minus freight).
- Exchange unopened products within 90 days with no restocking fee.
- Special-order items are non-returnable.
- Returns are handled directly by AMSOIL.
Frequently Asked Questions
In controlled dyno testing, DOMINATOR Coolant Boost reduced stabilized engine temperature by 8°F (4.5°C) with 50/50 antifreeze/water and 25°F (14°C) with straight water.
Yes. DOMINATOR Coolant Boost works with both straight water (racing) and antifreeze/water mixtures (street). For antifreeze mixtures, add 1 fl. oz. per quart of system capacity once per year or every 30,000 miles.
Customer Reviews
See all 67 reviewsEngine Warms Up Faster and Heat is Hotter in Cabin
Does what it says it does. In the winter it warms up faster and looking forward to running cooler in the summer. Recently added to my maintenance routine on all 3 of my vehicles because I've been so impressed with all AMSOIL's products I've tried
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.