AMSOIL DOMINATOR 10W-40 Synthetic Racing Oil
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Straight-Grade Protection in a Multi-Grade Formulation
AMSOIL DOMINATOR 10W-40 Synthetic Racing Oil is designed to protect high-performance racing applications operating on the ragged edge. With the highest viscosity index (174) in the DOMINATOR lineup, it maintains consistent protection across the widest temperature range.
Key Benefits
- Highest viscosity index (174) in the DOMINATOR lineup
- 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
- Suitable for aluminum block racing engines
- 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.
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 15.8 |
| Kinematic Viscosity @ 40°C, cSt | 97.2 |
| Viscosity Index | 174 |
| CCS Viscosity, cP (°C) | 6493 (-25) |
| Pour Point | -42°C (-44°F) |
| Flash Point | 224°C (435°F) |
| Fire Point | 232°C (450°F) |
| Four-Ball Wear Test Scar, mm | 0.39 |
| Total Base Number | 8.0 |
| High-Temperature/High-Shear Viscosity @ 150°C, cP | 4.6 |
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 40 viscosity oil is suitable, including: asphalt late model, dirt late model, modified big block, modified small block, GM crate late model, marine, sprint, aluminum block.
Not intended for long-term use in passenger cars/light trucks.
Pros and Cons
Pros
- Highest viscosity index (174) in the DOMINATOR lineup
- 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
- Suitable for aluminum block racing engines
- 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 10W-40 is suitable for asphalt late model, dirt late model, modified big block, modified small block, GM crate late model, marine, sprint and aluminum block racing applications where an SAE 40 viscosity oil is appropriate.
Customer Reviews
See all 88 reviewsAMSOIL DOMINATOR® 10W-40 100% Synthetic Racing Oil
Quality is excellent. Bought it for adding year around. I am recommend this oil to any one.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.