Boosters are new technology, exclusive to Castrol. They’ve been specially engineered to fight wear, deposits and corrosion, the main causes of engine damage, to deliver superior protection in 3 ways:
Durashield™ Boosters help prevent soot particles agglomerating (fusing together) into larger, damaging particles, and also help remove harmful soot particles from metal surfaces, resulting in less metal to metal contact.
Durashield™ Boosters provide a protective film on moving metal surfaces even under difficult conditions, maintaining the oil film layer, and preventing damaging metal to metal contact.
The increased operating temperatures generated in engines designed to meet stricter emission control laws, can lead to increased deposits and corrosion within the engine. Durashield™ Boosters deliver improved deposit and corrosion protection compared to industry tests and specifications.
Without DuraShield™ boosters the oil film broke down resulting in metal to metal contact and abrasive wear. With DuraShield™ boosters a protective film is formed on the metal surface preventing abrasive wear.
Extensive research has proven that Castrol RX with CJ-4/E9 with Durashield™ Boosters delivers up to 40% better wear protection.*
For any truck owner, that’s as good as money in the bank.*
*Average of wear parameters in industry standard tests vs. industry test pass criteria.