The Importance of Proper Cooling System Maintenance

Research has shown that 40% of all engine problems in heavy-duty diesel engines are related, directly or indirectly, to improper cooling system maintenance.

Regular cooling system maintenance is vital to keeping an engine running properly. The use of a fully formulated, high quality lifetime coolant such as Fleetguard’s Fleetcool OAT or ES Compleat help reduce operating costs, minimize engine downtime and ensure better reliability and durability from engines and cooling systems.

Both Fleetcool OAT and ES Compleat are supported by a robust, high-quality additive package which protects engines and components better and longer than standard light-duty and heavy-duty coolants.

We compared Fleetcool OAT and ES Compleat with standard Light Duty and Heavy Duty Coolants in a European heavy-duty truck environment. Here are the results:

240,000km 3,000h

The additive package of a standard light-duty coolant is already fully depleted. Engine and components are no longer protected against corrosion, cavitation, scaling or acidity. Coolant has to be drained and fully replenished. That is bad for the environment. It also means costly downtime for your equipment.

At this point, the total cost of ownership for the light-duty coolant has already doubled.

Fleetguard Quality Coolants vs Standard Coolants

Purchase Price

Total Cost (TCO)

Additive package depleted.Fully replace Coolant.

Standard Light Duty Coolant

Did You Know That... ■ Fleetguard Lifetime Coolants last up to 4 times longer than standard light-duty and heavy duty coolant ■ Fleetguard Lifetime Coolants' total cost of ownership is much lower compared to standard light- and heavy-duty coolant ■ Fleetguard Lifetime Coolants inherit a robust, high quality additive package ■ Fleetguard Lifetime Coolants is the best engine protection, reducing downtime and minimizing operating cost! ■ Fleetcool OAT does not require any Supplemental Coolant Additive product and can just be topped off with Fleetcool OAT Premix

720,000km 9,000h

The light-duty coolant has to be replenished for the 3rd time.

The total cost of ownership has quadupled at the same time.

480,000km 6,000h

Additive packages of the standard light-duty as well as the heavy-duty coolant are depleted. Draining and refilling the system is required.

The total cost of ownership for the standard heavy-duty coolant has doubled. The total cost of ownership for the light-duty coolant has tripled.

At the same time, Fleetguard Fleetcool OAT organic acid technology coolant only requires a ‘running check’ - its strong and robust additive package assures continuous protection.

Purchase PricePurchase Price

Total Cost (TCO)Total Cost (TCO)

Purchase Price

Total Cost (TCO)

960,000km 12,000h

Continuous replenishment of the coolant is required for the standard light- and heavy-duty coolants. Only quality checks for Fleetcool OAT and ES Compleat. Top off ES Compleat with Supplemental Coolant Additive (SCA) if necessary. Fleetcool OAT does not require any diesel coolant additive but can just be topped off with Fleetcool OAT Premix.

Standard Heavy Duty Coolant

Purchase PricePurchase Price Purchase PricePurchase Price

Total Cost (TCO)Total Cost (TCO) Total Cost (TCO)Total Cost (TCO)

Additive package depleted.

Fully replace Coolant.

Standard Light Duty Coolant

Additive package depleted.

Fully replace Coolant.

Additive package depleted.Fully replace Coolant.

Fleetcool OAT

Control at Standard Service Interval

ES Compleat

Top off with SCA at standard service interval.

Standard LightDuty Coolant

Standard Heavy Duty Coolant

Additivepackage depleted.Fully replace Coolant.

Standard Light Duty Coolant

Additive package depleted.Fully replace Coolant.

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