[Chow Gar]

This is the oil I will be putting in my car come service time.

Engine Oil for Mercedes

 

[Chow Gar]

I would stick to the thicker grade 5W30. With all the head failures, it's better to have a little thicker oil. I've used 5W30 Castrol Edge, mercedes version, from the beginning on my A35 AMG.

 

[Chow Gar]

My A35 is on 13K miles and I've only used Castrol Edge 5W30 M for all services. This is a slightly thicker oil than 0W30 and I haven't had any engine issues, neither have I needed any top ups between services. I also own a gen 1 Porsche 997 and these cars have a widespread known fault with cylinder bore scoring. Hartech are one of the most respected engine specialists in the country, who have also designed and developed industry leading solutions to this issue. Porsche also specify a 0W30 oil for these cars, but Hartech who have rebuilt hundreds of these engines, recommend a thicker oil of at least 10W50 viscosity. Obviously our engines are different, but the principle of not using oil that's as thin as water is what should be of concern, when it's flowing through and coating engine parts.