Work Truck Logo
MenuMENU
SearchSEARCH

Cummins Filtration Introduces NAP-Free Oat Coolant

NASHVILLE, TN - Cummins Filtration released its environmentally-friendly Fleetguard ES Compleat Organic Acid Technology (OAT) Coolant in a nitrite, amine and phosphate free (NAP-free) formulation.

by Staff
March 24, 2010
2 min to read


NASHVILLE, TN - Cummins Filtration released its environmentally-friendly Fleetguard ES Compleat Organic Acid Technology (OAT) Coolant in a nitrite, amine and phosphate free (NAP-free) formulation. ES Compleat OAT does not contain borate or silicate, which makes it acceptable to most OEM's around the world.  The NAP-free formula offers solid liner pitting protection and better aluminum protection than conventional OAT coolants containing nitrite.  

"We take environmental responsibility very seriously at Cummins Filtration. Being able to support sustainability with an OAT coolant that also offers excellent protection is very important to our mission," said Doug Hudgens, senior technical advisor for Cummins Filtration. "We have long supported the importance of greener solutions through all our product development, and we are very pleased to introduce our new environmentally friendly NAP-free OAT Coolant to the marketplace."

Cummins Filtration conducted extensive testing before the new formulation was approved for the market, Hudgens said.  All tests confirmed that the NAP-free ES Compleat OAT coolant provides the anti-freeze, anti-boil, heat transfer and corrosion protection required of today's fully formulated, heavy duty antifreeze/coolant. The new formulation meets ASTM and the performance specifications of most major OEMs including those for Cummins, Detroit Diesel, MAN, Volvo, MACK, and Navistar.

With extended service intervals of 150,000 miles (250,000 km or 4,000 hrs), ES Compleat OAT offers freeze protection to -34 F° and provides ultimate liner pitting, corrosion, aluminum and solder protection for longer system life. The coolant is compatible with gaskets, elastomers and other non-metallics in the engine and is suitable for all diesel, gasoline and natural gas engines.

Fleetguard ES Compleat OAT coolant extends service intervals, reduces maintenance time and ensures the ultimate protection for equipment and the environment.  ES Compleat OAT is available in both concentrated and premixed formulations.  The premixed OAT formula eliminates the need for mixing concentrated product with water, ensuring the cleanest solution enters the cooling system and reduces costly maintenance time. With specially designed Fleetguard coolant test strips and refractometers, field testing is quick and easy, keeping engines running better with fewer trips to the service bay.

More Maintenance & Uptime

Partnership announcement graphic featuring the Kooner Fleet Management Solutions and Global Partners logos above four commercial semi-trucks, highlighting expanded access to fueling and on-site fleet maintenance services.

Kooner and Global Partners Connect Mobile Fleet Maintenance and Fueling Services

A new referral partnership connects on-site fueling and maintenance services, with a focus on reducing off-site trips and making better use of fleet downtime.

Read More →
Fleet maintenance graphic showing a technician holding a wrench beside a truck tire, with the headline “Preventing Unplanned Downtime” and subhead about an inspection list that catches maintenance failures.
Maintenance & Uptime•October 8, 2026

Maintenance Failures That Sideline Work Trucks and the Inspection List That Catches Them Early

Unplanned downtime hurts efficiency and even profitability for work truck fleets, but catching potential problems early can help prevent it. Here is an inspection list that can help potentially prevent that downtime.

Read More →
Hunter Engineering ADASLink Remote Diagnostics System graphic showing a technician holding a diagnostic tablet, with Hunter ADASLink and Bosch branding.

Hunter Engineering Enters Collaborates with Bosch for Remote Diagnostics Service Through ADASLink

Hunter Engineering’s collaboration with Bosch enables ADASLink to connect directly with Bosch diagnostic experts through an integrated remote support platform, allowing shops to service more vehicles.

Read More →
Ad Loading...
White Mack MD medium-duty vocational truck equipped with a tank body parked beneath an overpass.

Mack Adds Chassis Coverage Options for Fleet Repair Costs

Mack Trucks introduced four system-specific chassis coverage plans, giving fleets more flexibility to manage repair costs for driveline, HVAC, electronics, safety systems, and other components.

Read More →
GM 30 Under 30 graphic featuring automotive service technicians working on vehicles in a service facility, highlighting the 2026 recognition program for young technicians.
Maintenance & Uptime•by News/Media Release•September 30, 2026

GM Launches ‘30 Under 30’ Program to Elevate Automotive Service Technicians and Inspire the Next Generation

The GM Automotive Service Technicians 30 Under 30 program honors GM service technicians under the age of 30 who demonstrate continuous technical training, exemplary customer service, mentorship, and leadership.

Read More →
Kooner Fleet Management Solutions and SAFE Truck Parking partnership graphic featuring four blue semi-trucks parked in a row against a dark background.
Maintenance & Uptime•by News/Media Release•September 30, 2026

Kooner Fleet Management Solutions Named Exclusive On-Site Fleet Maintenance Provider for Safe Truck Parking

A strategic partnership between Kooner Fleet Management Solutions and Safe Truck Parking brings mobile maintenance and 24/7 repair services directly to Safe Truck Parking locations, beginning in San Diego, California, with nationwide expansion planned.

Read More →
Ad Loading...
Split-screen graphic comparing engine hours and mileage, with a glowing 24-hour symbol on the left and a high-mileage vehicle speedometer and odometer on the right.
Remarketing & Lifecycle•September 22, 2026

Building a Better Vehicle Replacement Model

Meter readings still matter, but engine hours, idle time, maintenance trends, and utilization can help fleets spot costly vehicles before the odometer does.

Read More →
A white work van.
Sponsored•September 21, 2026

How JASPER Keeps Fleets Moving and Profitable

Every business decision within fleet management ultimately comes down to financial performance. Investing in dependable replacement powertrain components and responsive support can measurably impact the bottom line.

Read More →
Three Ryder technicians in red shirts hold oversized prize checks after the 2026 Top Tech Championship, with a live band performing on stage behind them.
Maintenance & Uptime•by News/Media Release•September 21, 2026

Ryder Honors 2026 Top Technician at 25th Anniversary Skills Competition

Hosted in Nashville, Ryder’s 25th annual Top Technician Skills Competition honored the best technicians across the U.S. and Canada. Top Tech celebrates technician expertise while promoting growth, recognition, and camaraderie. Here are the winners.

Read More →
Ad Loading...
Jasper Engines & Transmissions graphic featuring a remanufactured GM 6.6L Duramax L5P/L5D engine for Chevrolet Silverado, GMC Sierra, and International CV515 trucks.
Maintenance & Uptime•September 21, 2026

Jasper Offers GM 6.6L Duramax L5P/L5D Complete Format Diesel Engines

Jasper Engines & Transmissions now offers the remanufactured GM Duramax 6.6L L5P/L5D as a complete format engine for several General Motors and International 2017-2023 HD pickup trucks.

Read More →