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 Nitrited 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).

Product Features:

• Extended Service Internal (ESI) SCA Precharged - Purple Formula
• Stabilized, Low silicate (no phosphates) formula - helps reduce deposits & hard water scale buildup
• Meets OEM Performance requirements: ASTM D6210, D3306, D4985; TMC RP329A, RP338A; Cummings CES 14603, CES 90T8-4; Detroit Diesel 93K217, 7SE298 and many OEM requirements
• Concentrated formula. Must mix with high quality (distilled/deionized) water to the desired ratio. Can be used for top-off, complete drain and refill or flush and refill of the cooling system.