2023 Peterbilt 365 Engine Coolant and Antifreezes

Prestone Command Extended Service Interval (ESI) antifreeze+coolant (Concentrate) is designed to work with all Class 6-8 vehicles. It is compatible with any IAC engine. This formula is Nitrites and precharged with supplemental coolant additive (SCA). Command ESI is a stabilized, low silicate formula, which helps reduce deposits and hard water scale buildup. There are no phosphates in this formula. Command ESI requires monitoring and maintaining the additive levels (SCAs). Volume: 1 gallon.

Prestone Command Cor-Guard Nitrite Free (NF-OAT) Extended Life (ELC) antifreeze+coolant (ready to use) is designed to work with all Class 1-8 vehicles; Heavy Duty and Light Duty. COR-GUARD technology increases uptime; More miles between service = Less cost to maintain. Utilizing Cor-Guard technology, this formula is designed to protect cooling system parts from corrosion and damage. It instantly protects against the spread of rust, corrosion, pitting, gunk, grime and build-up. It is one fluid that can be used for the whole fleet; all vehicles, coolant colors (LD) and any Nitrite Free OAT engine (HD). Service life is 1,000,000 Miles/20,000 hrs [class 7-8 with wet sleeve liners]. When compared to ESI and low silicate conventional, it is designed to help lower maintenance costs and improve water pump life. This formula is Nitrite Free, provides excellent protection for aluminum and all other engine metals and eliminates the need to add supplemental coolant additives. Volume: 1 gallon.