High-Load Turboprop Synthetic Oil

AeroShell Turbine Oil 750 (ASTO 750) is a specialized 7.5 mm²/s (cSt) synthetic diester turbine oil engineered with a high-performance additive package to deliver exceptional load-carrying capacity and thermal-oxidative stability. Developed specifically to satisfy the stringent requirements of DEF STAN 91-98 (formerly DERD 2487), ASTO 750 provides superior lubrication for heavy-duty propeller reduction gearboxes in civil and military turboprop engines.

Turboprop & Gearbox Advantage: Qualified under NATO Code O-149 (OX-38), French AIR 3517A, and officially recognized as the analogue to Russian MN-7.5u (TU 38.1011722-85), AeroShell 750 prevents tooth scoring, gear wear, and sludge accumulation. It replaces legacy mineral/piston oil blends in Eastern European turboprops while maintaining high-temperature gear protection under severe torque cycles.

Ordering Information:
• Bulk Hangar Packaging: Full Case of 24 Quart Cans (1 US Qt each) | MFG #: 550049744
• Synthetic diester chemistry. Please verify system seal and paint compatibility prior to application.

Key Characteristics & Performance Benefits

• DEF STAN 91-98 & NATO O-149 Approved: Fully qualified to British and NATO military specifications governing 7.5 cSt high-load turbine lubricants.
• Extreme Reduction Gearbox Protection: High-load carrying formulation shields high-torque propeller reduction gears and bearing surfaces from micro-pitting and scoring.
• Russian MN-7.5u Official Analogue: Direct replacement for TU 38.1011722-85 MN-7.5u and legacy mineral oil/aircraft piston oil mixtures in regional turboprops.
• Thermal & Oxidative Defense: Resists oil breakdown, varnish, and acid formation during continuous high-temperature flight operations.
• Complete Hangar Supply Case: Packaged in a full case of 24 individual quarts to streamline fleet maintenance inventory replenishment.

Typical Aviation Applications

• British & European Civil Turboprops: Primary lubricating oil for civil turboprop engines requiring DERD 2487 / DEF STAN 91-98 standards.
• Propeller Reduction Gearboxes: Deployed in high-power reduction gear systems where 3 cSt or 5 cSt turbine oils lack sufficient load capacity.
• Russian & Eastern European Turboprops: Fully approved analogue for aircraft powerplants specifying MN-7.5u lubricant matrices.
• Industrial & Marine Gas Turbines: Suitable for specialized aeroderivative gas turbines requiring 7.5 cSt load-carrying synthetic fluids.

Technical Specifications & Military Approvals

• All in-stock orders are processed within 1–2 business days (excluding weekends and holidays) after receiving your order confirmation email.
• Orders with a lead time will ship according to the estimated shipping time shown on the product page.
• If we experience a high volume of orders or if an item is backordered, processing times may be slightly delayed. We will notify you promptly via email.

• Returns and damage claims must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization - RMA). Returns without prior notice or written authorization will not be accepted. We strongly recommend inspecting the product upon delivery; many products require special storage conditions for which we are not responsible once they arrive to the client's facility. Please review the product's SDS for proper storage and handling.
• For products with 3 to 6 months of remaining shelf life, claims must be made within the next 2 business days after receipt.
• Returns are not accepted for products with less than 3 months of remaining shelf life.
• Returns are not accepted for products purchased during a low Shelf Life promotion, items sold with discounts, or special orders that must be placed directly with the factory.
• The customer is responsible for the return shipping cost, except in cases where the return is due to an error on the part of Aircraft Shop Supply.
• Refunds will only be issued after the product has been inspected and no damage is found.
• A 25% Restocking Fee will be charged for returns of products in good condition that are either no longer needed or were ordered incorrectly.
• A 35% Restocking Fee will be charged for returns of products with one year or less of remaining shelf life.
• No Restocking Fee will be charged if Aircraft Shop Supply is responsible for incorrectly shipping a product, or if the order is damaged upon leaving the warehouse.
• Hazardous Materials & Dangerous Goods: These items are sold as final and are not eligible for return approval.

At Aircraft Shop Supply, we are committed to shipping the highest quality and freshest product possible. To ensure efficient stock rotation and meet aviation industry standards, our inventory management is governed by the following policy:

1. Scope of Application
All Sales Channels: This policy applies to all orders processed by Aircraft Shop Supply, including but not limited to: website purchases, direct email orders, formal Purchase Orders (POs), phone orders, and contract agreements.

2. Inventory Management (FIFO)
All products with an expiration date are managed and shipped on a strict "First In – First Out" (FIFO) basis.

3. Minimum Shipping Margin
Standard Guarantee: We will not ship any products with fewer than 30 days of use remaining (days before expiration), unless previously coordinated and agreed upon with the customer.

No Automatic Guarantees: Outside of this 30-day minimum margin, Aircraft Shop Supply does not make any automatic guarantee as to the specific length of time remaining on any shelf-life item for standard orders.

4. Special Customer Requirements
We understand that certain projects, maintenance schedules, or regulatory standards require strict specifications. If your order has specific shelf-life requirements, please proceed as follows:

How to Request: If you require a specific Date of Manufacture (DOM), Date of Expiration (DOE), or a specific minimum shelf-life percentage (%), you must clearly state this requirement:

In the Comments/Notes section when placing an online order.

Explicitly written on your Purchase Order (PO) or quote request email for offline orders.

Validation Process: Once your requirement is received:

We will ship your order if the available stock matches your specifications.

If we do not have the exact batch, we will contact you prior to shipping with the shelf-life percentage (%) or dates we have available for your acceptance.

5. Limitation of Liability and Validity of Information
To ensure transparency and manage expectations, the following terms and conditions apply:

Time-Limited Validity: Any information provided by our team regarding the remaining shelf-life percentage (%) is valid only at the exact time the inquiry is made. Due to high inventory turnover, availability is subject to change without prior notice.

Informational Purposes Only: Shelf-life data provided by Aircraft Shop Supply is strictly for informational purposes and reflects the availability at the moment of inquiry. It does not constitute a batch reservation or a product warranty.

Supply Chain Liability Exclusion: Aircraft Shop Supply is not responsible for the time elapsed or any product expiration that occurs after the order has been prepared and packed. This includes, but is not limited to: the time between order placement, carrier transit times, intermediary storage, customs delays, and final delivery to the end user. It is the customer's responsibility to account for these logistical lead times within their planning.