Castrol Natural Gas Products
Castrol® Duratec™ natural gas engine oils perform under a wide range of temperatures and surpass key performance requirements for both on- and off-road applications.
Find which product is right for you:
Castrol® Duratec™ NG 15W-40
The On road natural gas engine oil that extends drain intervals up to 600 hours.
Castrol® Duratec™ ES 15W-40
The On road synthetic natural gas engine oil that enables “extreme” extended drain intervals up to 1200 hours.