Lucas Oil Hydraulic Oil Booster/STO additive — restores pressure, reduces leaks & conditions seals

Lucas Oil Hydraulic Oil Booster/STO is a concentrated additive that restores hydraulic pressure, reduces leaks, and prolongs component life in worn or older hydraulic systems.

When hydraulic circuits show symptoms like slipping, chatter, rising temperatures, or slow actuation, a targeted additive can be a cost-effective alternative to immediate component replacement. Lucas Oil Hydraulic Oil Booster/STO is formulated to condition seals, improve lubricity, and help recover lost efficiency in hydraulic pumps, valves, rams and transmissions. It works with conventional and synthetic hydraulic fluids and is suitable for many mobile and industrial applications.

How does this product help reduce leaks and seal problems?

The additive contains seal conditioners that soften and swell aged elastomers, helping them reseal minor gaps and reduce seepage without disassembly. Regular use restores flexibility to O-rings and other seals, making leaks less likely to recur under normal operating pressures.

• Conditions old seals and O-rings to minimize leak paths
• Reduces the need for immediate seal replacement in many cases
• Compatible with typical seal materials used in hydraulic equipment

Will it improve hydraulic pressure and performance in worn systems?

By reducing internal leakage and restoring lubricant film strength, the Booster/STO can recover lost pressure and reduce slipping or slow cylinder movement. It also helps remove varnish deposits that restrict flow and impair valve operation, enabling smoother system response.

• Helps restore pressure in worn pumps and valves
• Removes varnish and deposits that impede flow
• Reduces slip, chatter and fading under load

Can it lower operating temperatures and extend fluid life?

The formulation improves lubricity and reduces friction, which lowers heat generation during operation. Better lubricity and contaminant-conditioning properties can also extend the useful life of hydraulic fluid, reducing downtime for fluid changeouts.

• Adds lubricity to decrease friction and wear
• Reduces operating temperatures under typical loads
• May extend hydraulic fluid life by slowing degradation

Is it compatible with my equipment and how is it applied?

Lucas Oil Hydraulic Oil Booster/STO is designed to be mixed directly into most conventional and synthetic hydraulic fluids and is safe for equipment with wet brakes. Follow manufacturer dosing rates and service instructions to achieve desired results without over-concentration.

• Works with both synthetic and conventional hydraulic oils
• Suitable for mobile and stationary hydraulic systems, including wet-brake applications
• Added directly to the reservoir; follow recommended mixing ratios

Who is this product for? Technicians, fleet managers and equipment owners looking for a budget-conscious preventative or short-term corrective option will find this product useful. It is particularly appropriate for older machinery showing early signs of seal hardening, reduced pressure, or heat-related wear, and for operations seeking to reduce downtime and delay costly hydraulic overhauls. For severe mechanical failures or damaged components, consult a qualified service technician to determine whether additive treatment is appropriate.

Key features at a glance:

• Reduces operating temperature and helps control heat buildup
• Conditions seals and O-rings to reduce and prevent leaks
• Compatible with wet-brake systems and both synthetic and conventional fluids
• Helps remove varnish and restore system pressure and efficiency
• Improves lubricity to lower friction, wear, and energy use
• May extend hydraulic fluid life up to twice as long under proper conditions