Equipment fires can happen in any industry. Hot running equipment, a leaking hydraulic seal, or blown hose can be a disastrous combination because traditional hydraulic fluid has a flash point around 240°F, so if equipment has a problem due to overheating of the operating temperature of the liquid, traditional hydraulic fluid is already close to its flash point. Bio-Ultimax™ 1000, a biosynthetic formula that directly replaces mineral oil based hydraulic fluids, has a flash point of 450°F. This 200-degree cushion can mean the difference between safety and catastrophe when a hydraulic hose breaks and sprays a hot running engine. 


Bio-Ultimax™ 1000 is available in various weights including ISO 32, 46, 68, and 100. In addition to significantly higher flash points across the entire range, these bio-based products are safer for employees to handle. Should a hose break or a seal fail on a jobsite, the cleanup can be a nightmare for equipment with traditional hydraulic fluids. And an expensive one, especially if the problem occurs near a wetland, a watershed, near a storm sewer, or other sensitive areas. EPA mandated cleanup costs are pricey, with plenty of paperwork involved. Using bio-based, environmentally friendly hydraulic fluids can eliminate the fines and speed the cleanup. 

With oxidation performance comparable to full synthetics, this is one of the safest hydraulic fluids for the environment. These advances in safety are accompanied by performance that meets or exceeds that of traditional hydraulic fluids. 


Ideal for stationary or mobile environments these super high Viscosity Index (VI) fluids are proven in systems up to 10,000 psi and in systems with ultra-fine filtration. To ensure performance and long life, Renewable Lubricants developed the stringent IsoGreen filtration standard which meets or exceeds the Rexroth pump guidelines for hydraulic fluids. Non-toxic, zinc-free formulations contain no heavy metals. In addition to enhancing performance, Renewable Lubricants (RL) helps companies achieve their sustainability goals. They are ideal for use in all types of hydraulic systems where low toxicity, biodegradability, and non-bioaccumulation properties are required.


These patented bio-based hydraulic fluids are formulated to perform in high- and low-pressure hydraulic systems that require Anti-Wear (AW), anti-rust, anti-oxidation, anti-foam, and demulisibility properties. With patented antioxidants (Stabilized™), these biosynthetics provide improved performance in oxidation stability over standard plant/vegetable/HETG and unsaturated HEES type fluids. They are highly inhibited against moisture and rusting in both fresh and sea water, and pass A and B sequences of the ASTM D-665 Turbine Oil Rust Test. Formulated to provide a longer seal life with reduced oil leakage, this environmentally friendly, zinc-free product meets or exceeds high-pressure pump requirements. 

Very little wear was encountered in field studies and in accelerated pump tests using biobased formulations in Denison T-5D, Vickers 20VQ, 35VQ-25 (M-2950-S), and V-104C (ASTM D-2882), Vickers I-286-S pump stand tests and pressures and temperatures ranging from 2000 to 3000 psi and from 150°to 210°F. Anti-wear performance exceeds requirements for US Steel 126, 136, and 127, load stage 10 in the FZG (DIN 51354) and GM (LS-2). 


Renewable Lubricants Hydraulic Fluids meet and exceed Federal Specifications for machine tool hydraulic systems and can replace specification MIL-PRF-17672E for ground support equipment. It meets EPA 21013 Vessel General Permit (VGP) guidelines for Environmentally Acceptable Lubricants (EALs) and should be used in hydraulic systems where low toxicity, biodegradability, and non-bioaccumulation properties are required.  

NOTE: STABILIZED by Renewable Lubricants™ is RLI’s trademark on their proprietary and patented anti-oxidant, anti-wear, and cold flow technology. High Oleic Base Stock (HOBS) are agricultural vegetable oils. This Stabilized technology allows the HOBS to perform as a high-performance formula in high and low temperature applications, reducing oil thickening and deposits. Patented product: US Patent 6,383,992, US Patent 6,534,454 with additional Pending and Foreign Patents.

For More Information:

Renewable Lubricants, Inc. began as a research and development company in 1991, developing high performance products that would directly replace petroleum-based products. Starting from a single corn-based engine oil developed in the inventor’s garage, the company now offers more than 250 products and has over 100 worldwide patents. The company manufactures its products as environmentally friendly as possible without sacrificing performance. For more, or visit

Modern Contractor Solutions, November 2023
Did you enjoy this article?
Subscribe to the FREE Digital Edition of Modern Contractor Solutions magazine.