HPS is recommended for use in gasoline and diesel automotive, commercial fleet and stationary industrial engines. Royal Purple HPS Series Motor Oil (with Synerlec) is specifically formulated to maximize performance and meet the demands of high performance and modified engines. HPS is recommended for vehicles no longer under manufacturer warranty and for those seeking a higher level of performance and protection. Royal Purple HPS oils are fortified with a high level of zinc/phosphorus anti-wear additive and a generous dose of Royal Purples proprietary Synerlec additive technology. These unique formulations enable HPS oils to outperform leading synthetic and conventional lubricants in both gasoline and diesel engines. 10W40. 6 Quarts. PERFORMANCE ADVANTAGES Exceptionally high film strength for reducing engine wear and reduced engine heat to extend the life of your engine. Improved sealing between the piston ring and cylinder wall maximizes horsepower and torque and optimizes fuel economy. Exceptional stability extends oil life and allows for more miles driven between oil changes saving you time and money. Advanced synthetic solvency reduces engine deposits and keeps engines clean. Outstanding wear protection for valve train components, including performance roller lifter and high lift flat-tappet camshafts and lifters. Superior corrosion protection.
Shipping & Delivery Information
Our Shipping Promise
At Slickpurchase, we understand how important your purchases are. That's why we take extra care with every package we send. All orders are shipped in double-boxes with full insurance for additional protection, ensuring your items arrive safely.
Processing & Shipping Timeline
- Processing Time: Orders are processed within 3-6 business days
- Domestic Delivery: Typically 6-10 business days
Please note that delivery times are estimates and may vary based on your location, weather conditions, or other unforeseen circumstances.
Shipping Destinations
Slickpurchase currently only ships to the United States.
Shipping Costs
We are pleased to offer free standard shipping on all orders within the United States.
Discreet Packaging
We respect your privacy. All Slickpurchase packages are shipped with complete discreet packaging. The product name, description, sender's name, and any information that hints about the contents are encrypted. Your package will arrive without any indication of what's inside, ensuring your purchase remains confidential.
Signature Requirements
Important Note: All orders valued above $250 will require a signature upon delivery for your protection.
Order Tracking
Once your order ships, you'll receive a tracking number via email so you can monitor your shipment's progress every step of the way.
Lost or Delayed Shipments
If your package is lost or significantly delayed, please contact our support team immediately, and we will assist you in resolving the issue.
Additional Security Measures
For your protection, we may contact you for additional order verification of the payment method on certain orders.
Questions or Concerns?
For details on returns and refunds, please refer to our Return Policy page.
For any questions about shipping or delivery, please contact our customer service team at support@slickpurchase.com.




















