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  5. 10W-40

10W-40

If your car needs a 10W-40 engine oil Castrol offers a range of options that flow like a 10 Weight oil when the engine is cold and a 40 Weight oil when up to normal operating temperature.

Choose the best 10W-40 oil for your engine.

Traffic congestion has dramatically increased over the past decade, so that today even a normal driver can stop and start up to 18,000 times a year*. That's annoying but worse, it slowly damages your engine - permanently.

 

Our breakthrough Castrol MAGNATEC DUALOCK molecules cling to critical engine parts and lock together, forming a powerful force field of protection that dramatically reduces both warm-up and stop-start wear by 50%*.

 

Non-Stop Protection from Every Start.

Castrol MAGNATEC 10W-40

Castrol MAGNATEC 10W-40 provides superior motor oil strength for engines that work harder due to higher engine pressures, helping your vehicle to maximize performance.