I used this product for 1,000km in a 2008 Toyota Kluger with 10,000km on the clock. The oil was given to me by the Castrol rep and he promised me it was the best. As soon as I started using it in the engine i would get valve train noise on start up every time. Having not experienced the issue when using Mobil 10w/40, I dumped the castrol oil, refilled with the trust Mobil and the noise went away. I will never run this rubbish in my engine again.