15W-40 is a very common viscosity grade for diesel engine oil.
Castrol GTX is one of the world's most trusted engine oils.
Castrol GTX uses the latest technology to meet the needs of today’s more demanding modern engines.
It’s more than just oil. It’s liquid engineering that protects against problems like sludge, that your engine faces every day.
Everyday stop start traffic, exceeding oil change intervals – these driving conditions can all cause the build up of a thick tar like substance called sludge.
Sludge build up in your engine can lead to decreased performance and in some cases premature engine failure.
Protect your car from harmful sludge build up with Castrol GTX