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AMSOIL Synthetic TBI ISO 32/46 Biodegradable Hydraulic Oil

  • Denison HF0, HF1, HF2
  • Vickers M-2950S, I-286S
  • Cincinnati Milacron P-68, P-70


AMSOIL TBI hydraulic oil is a premium lubricant designed to biodegrade to its natural state when subjected to sunlight, water and microbial activity. Because it is formulated with ashless additives that do not contain heavy metals, TBI has a very low toxicity level.

AMSOIL TBI incorporates very high-quality synthetic base oils that provide thermal stability, even though they are biodegradable. TBI also contains antiwear additives that have been thoroughly tested and qualified against stringent hydraulic oil standards including Denison HF0, HF1 and HF2, Vickers M-2950S and I-286S and Cincinnati Milacron P-68 and P-70. TBI provides optimum protection for hydraulics, preventing pump wear and rusting of critical components. It also contains antioxidants that increase oil life and foam inhibitors that quickly release air from the oil.

Based on high-quality, synthetic oil chemistry that better withstands heat and lasts longer, TBI outperforms vegetable oil-type, biodegradable hydraulic oils, ensuring problem-free operation.


AMSOIL TBI is recommended for gear, vane and piston stationary and mobile hydraulic systems. TBI is a multi-viscosity, SAE 5W-20 oil and is recommended for use in place of either ISO-32 or ISO-46 hydraulic oils. TBI is essentially compatible with typical hydraulic oils, and small amounts of contamination (lines, residue) are acceptable. However, it is recommended systems be drained prior to installing TBI. Excessive system contamination will minimize its biodegradability effectiveness.

TBI is especially well suited for applications where environmental contamination due to leaking or blown hydraulic lines presents an environmental hazard. TBI has been tested and found compatible with Nitrile (Buna-N), Poly Acrylate, Fluorocarbon (Viton) and Silicone seals which are commonly found in hydraulic systems.

The ability of TBI to extend drain intervals and excel in performance is subject to operating conditions and maintenance practices. Monitoring by oil analysis is recommended.


  • 80% Biodegradable Within 21 days (CEC L-33-A-94)
  • Thermally Stable
  • Resists Oxidation
  • Anti-Rust and Anti-Foam
  • -51°F Pour Point For Cold Temperature Performance
  • Outperforms Vegetable Type Bio-Hydraulic Oils


AMSOIL Industrial Lubricants are formulated to exceed accepted industry specifications. AMSOIL warrants that the use of its lubricants will not cause mechanical damage to any mechanically sound equipment when AMSOIL products are used in full compliance with the company’s recommendations. However, the purchaser is responsible for determining if these specifications are adequate and proper for the intended application. The AMSOIL warranty is limited to lubricant performance consistent with indicated specifications. No additional warranty, expressed or implied, can be made.


AMSOIL products are available in 5-gallon pails, 55-gallon drums, 275-gallon totes and bulk quantities.

AMSOIL Industrial Lubricants are stocked in Superior, Wisconsin and in select regional distribution centers throughout the United States and Canada. AMSOIL will stock additional quantities of lubricants or special order products based on customer requests and regional demands. For applications and recommendations, contact your local AMSOIL industrial sales representative or AMSOIL INC.

Typical Technical Properties
Synthetic TBI ISO 32/46 Biodegradable Hydraulic Oil
ISO VG - ASTM D-2422 32/46
SAE Grade 5W-20
Viscometrics 100C, cSt - ASTM D-445 7.20
Viscometrics 40C, cSt - ASTM D-445 40.1
Viscosity Index (VI) - ASTM D-2270 144
Specific Gravity - ASTM D-1298 0.9478
Density - ASTM D-1298 7.893
Four-Ball Wear Test - ASTM D-4172 (40 kg, 1200 rpm, 75 C, 60 min.) 0.41
Flash Point C (F) - ASTM D-92 268C (514F)
Fire Point C (F) - ASTM D-92 289C (552F)
Pour Point C (F) - ASTM D-97 -46C (-51F)
Copper Strip Corrosion Test - ASTM D-130 1A
Foam - ASTM D892  

Sequence I


Sequence II


Sequence III

Demulsibility - ASTM D1401 Oil/Water/Cuff (minutes) 40/40/0 (10)
Dielectric Strength, KV - ASTM D-887 36KV
Biodegradability % - CEC L-32-A-94 80
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