QC Lubricants
7360 Milnor St • Philadelphia, PA 19136
(215) 333-4187 Direct Line

Toll Free
With Extension: (800) 887-2436
For Sales Manager: Dial Extension 203 for Stan Jakubowski
For Sales Assistance: Dial Extension 211 for Lu Ann Quinn


We actively supply a comprehensive line of MIL-SPEC and commercial lubricants.

PDS and Other Docs Shelf Life Data Boeing Specs McDonnell Douglas Specs
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LHB Industries




High Response Hydraulic System Fluid

Castrol Aero 35

Castrol Aero 35 Yellow/Red Product Description:
Castrol Aero 35 is a high quality, MIL-PRF-6083F based, ISO Grade 15 mineral hydraulic fluid which contains anti-wear agents and corrosion inhibitors. Castrol Aero 35 also contains a shear stable viscosity index improver, anti-oxidant, and an approved EP additive system which reduces martensitic streaking of landing gear outer cylinders and galling of shock strut upper bearings. This formulation is specially designed to reduce the "stickslip" properties of MIL-PRF-6083F fluids. Castrol® Aero 35 is available in two versions: red dyed (Douglas Aircraft) or straw colored (yellow) undyed (Boeing Spec BMS 3-32, Type I).

QC Lubricants carries Castrol Aero 35 yellow in pails and drums, and Castrol Aero 35 Red in drums only.

Castrol Aero 35 Yellow/Red Uses:
Castrol® Aero 35 is specially designed for use in landing gear shock struts. Additionally, Castrol® Aero 35 is compatible with approved MIL-PRF-5606 and MIL-PRF-6083 hydraulic fluids. It is not completely compatible with synthetic gas turbine lubricants or with phosphate-ester hydraulic fluids. It is compatible with other petroleum-based and synthesized hydrocarbon lubricants, but contamination should be avoided in order to maintain the unique properties of Castrol® Aero 35. This product is also compatible with most seals, hoses, and paints, normally used in shock struts and dispensing equipment connected with this application. While certain grades of these materials are fully compatible with Castrol® Aero 35, it is advisable to confirm acceptability of use with either the material manufacturer or the appropriate technical support contact.

Approval Status:
Castrol Aero 35 Red is formulated in accordance with Douglas Aircraft Specification DPS 3.334 and referenced as Douglas stock number DPM 6177. Castrol® Aero 35 Yellow is formulated as an alternative to Boeing Service Letters 707-SL-12-2; 727-SL-12-2; 737-SL-12-2; 757-SL-27-15-B. These letters instruct the addition of an EP additive to either the standard or corrosion inhibited mineral based hydraulic fluid for use in their landing gear shock struts. Castrol® Aero 35 Yellow is fully approved to Boeing BMS 3-32 (Type I).

Shelf Life:
Castrol Aero 35 has a maximum recommended shelf life of 6 years from date of manufacture. This shelf life assumes that the product is stored in its original unopened packaging in ambient temperature conditions.

Castrol Aero 35 Typical Properties:

Castrol Aero 35 Product Data

Health, safety and environmental information are provided for this product in the Materials Safety Data Sheet. This gives details of potential hazards, precautions and First Aid measures, together with environmental effects and disposal of used products. Castrol will not accept liability if the product is used other than in the manner or with the precautions or for the purpose(s) specified. Before using the product other than directed, please contact Castrol for consultation.

As with any product we carry at QC Lubricants, if you have any questions, please give us a call. Our dedicated staff is eager to hear from you!
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