CAT BIO HYDO ADVANCED

Standards & approvals

• OECD 301B

  OECD 301B biodegradability above 60 %

  OECD test measuring carbon dioxide evolved over 28 days; above 60 % counts as "readily biodegradable".

• SS 15 54 34

  SS 15 54 34 — environmental requirements for hydraulic fluids (Sweden, generic)

  The Swedish environmental standard for hydraulic fluids.

Specifications

Brand

Caterpillar (Cat)

Range

Cat HYDO

Category

Hydraulic oils

Viscosity

ISO VG 46

Manufacturer code

43107

Availability

On request

Typical characteristics

Manufacturer's description

Cat Bio HYDO Advanced is a synthetic ester based hydraulic fluid with more than 90% bio-based content (per ASTM D6866), developed for use across a wide range of applications, conditions and temperatures. Despite its environmentally friendly formulation, Caterpillar states it delivers the drain interval performance of a premium mineral-based hydraulic oil, with exceptional system protection, superior wear protection, corrosion resistance and fast air release comparable to premium mineral-based hydraulic oils. It is EU Flower eco-label certified and USDA BioPreferred-listed. The fluid is formulated with a low-foaming, fast-air-release chemistry and specially developed additives that form a protective wear layer on hydraulic pump and component surfaces, while emulsifiers hold water in dispersion rather than letting it separate and damage components. It is highly compatible with the seals used in Cat hydraulic systems, helping reduce leaks and maintenance costs, and maintains consistent wear protection across a wide temperature range. Typical values from the Cat technical data sheet include oxidation stability of more than 3,000 hours (dry, ASTM D943), a viscosity of 44.3 cSt at 40°C and 8.6 cSt at 100°C, a viscosity index of 176, a pour point of -45°C, and Brookfield viscosities of 1,227 cP at -20°C and 3,039 cP at -30°C (ASTM D2983). Caterpillar recommends it for ambient temperatures from -30°C to +45°C, and notes it is suitable for use in environmentally sensitive areas, with long-drain-interval capability confirmed by field testing.

Applications

• Synthetic ester-based hydraulic fluid for a wide range of applications and operating conditions, with reliable performance across a wide temperature range.

Performance & benefits

• USDA BioPreferred listed and biodegradable (84% bio-based content per ASTM D6866; OECD 301B biodegradability of 62% after 28 days).
• Meets ISO 15380 (2016) and Swedish Standard SS 15 54 34.
• Carbon-negative: captures more carbon than it emits during production.
• Excellent oxidation stability supports extended drain intervals, comparable to premium mineral-based hydraulic oils.
• Excellent thermal and oxidation stability also improves system cleanliness, reducing deposits, maintenance downtime and costs while extending oil life.
• Maintains consistent wear protection across the full operating temperature range, from -17°C to 93°C (2°F to 199°F).
• Highly compatible with the seals used in Cat hydraulic systems, reducing leaks and maintenance costs.
• Effective wear protection and corrosion protection for steel and bronze components, plus fast air release.

Fits

• Construction equipment