ye nahin karna tha shampoo daal ke car kabi drive mat karna and naa hi high rev karna...just drop it in engine oil and leave it on idle start for 10_12 mins..
Aisa castrol ki wrbsite pe kahi bhi nahi likha hai. Poori webaite maine check ki agar koi warning likhi ho to. Problem hoti to castrol website pe zarur likhta www.castrol.com/en_my/malaysia/home/engine-oil-and-fluids/engine-shampoo.html