AMSOIL DOMINATOR 5W-20 Synthetic Racing Oil
Join the Preferred Customer program to save approximately 25% off the retail price today
Estimated delivery by or sooner
4 units available for local pickup
at National Synthetics — arrange pickup
Ships directly from AMSOIL
Delivered fast from the closest AMSOIL distribution center.
Straight-Grade Protection in a Multi-Grade Formulation
AMSOIL DOMINATOR 5W-20 Synthetic Racing Oil is designed to protect high-performance racing applications operating on the ragged edge. It is engineered to withstand the elevated RPM, high temperatures and shock-loading common to racing applications. Its robust formulation is lab-crafted to provide maximum horsepower without sacrificing engine protection and has been tested and validated by championship-winning race teams.
Key Benefits
- Straight-grade protection in a multi-grade formulation
- Proprietary friction modifiers maximize horsepower and torque
- Heavily fortified with zinc and phosphorus anti-wear additives
- Resists viscosity loss due to mechanical shear
- Lowest pour point (-48°C) in the DOMINATOR lineup for excellent startup protection
- Thermally stable synthetic chemistry resists intense racing heat
- Tested and validated by championship-winning race teams
- Available to all racers — same formula used by AMSOIL-sponsored professionals
Maximum Horsepower and Wear Protection
DOMINATOR's durable formulation resists viscosity loss due to mechanical shear to maintain a strong protective oil film. It is heavily fortified with zinc and phosphorus anti-wear additives to provide additional protection against scuffing and wear in severe racing conditions.
Formulated with proprietary friction modifiers to reduce energy lost to friction, DOMINATOR delivers maximum horsepower and cooler engine temperatures, promoting improved lap times and longer-lasting components.
Its low pour point of -48°C (-54°F) offers excellent startup protection with less drag before stable operating temperatures are reached.
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 9.1 |
| Kinematic Viscosity @ 40°C, cSt | 51.5 |
| Viscosity Index | 159 |
| CCS Viscosity, cP (°C) | 5347 (-30) |
| Pour Point | -48°C (-54°F) |
| Flash Point | 230°C (446°F) |
| Fire Point | 254°C (489°F) |
| Four-Ball Wear Test Scar, mm | 0.40 |
| Total Base Number | 8.0 |
| High-Temperature/High-Shear Viscosity @ 150°C, cP | 3.1 |
Applications
Compatible with leaded and unleaded gasoline, diesel, alcohol, nitromethane and nitrous oxide. Use in domestic and import high-performance racing engines where an SAE 20 viscosity oil is suitable, including: modified small-block, bracket, asphalt late model, midget.
Not intended for long-term use in passenger cars/light trucks. Service life is at the vehicle owner's discretion based on the event, application and viscosity needs.
Pros and Cons
Pros
- Straight-grade protection in a multi-grade formulation
- Proprietary friction modifiers maximize horsepower and torque
- Heavily fortified with zinc and phosphorus anti-wear additives
- Resists viscosity loss due to mechanical shear
- Lowest pour point (-48°C) in the DOMINATOR lineup for excellent startup protection
- Thermally stable synthetic chemistry resists intense racing heat
- Tested and validated by championship-winning race teams
- Available to all racers — same formula used by AMSOIL-sponsored professionals
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
Get championship-proven protection for your race engine. 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
DOMINATOR 5W-20 is suitable for domestic and import high-performance racing engines where an SAE 20 viscosity oil is appropriate, including modified small-block, bracket racing, asphalt late model and midget applications.
No. DOMINATOR Synthetic Racing Oil is not intended for long-term use in passenger cars or light trucks. It is formulated specifically for racing and competition applications.
Customer Reviews
See all 88 reviewsProfessor
I got introduced to Amsoil in 1978 I built strictly race engines four and two strokes . I am on my 56th year of building raceengines. I’ve yet to find a better productproduct. It’s the best you can take that to the bank.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.