bengal
Registered User
My cam chain tensioners rattling when the revs are picked up slightly. Will too thin oil cause it to be noisy and will a thicker grade help reduce the noise. I ask about the oil as i have 5w40 synthetic in at the moment before it had 10w40 and it wasnt noisy also i have seen castrol 15w40 high mileage would anyone recommend this for a turbo car as its done 160000 miles now thanks.