XSeries-forum

hi all as anyone used the above product ,a friend of mine used it on his audi tdi 100k miles and he says he as noticed a noise reduction from his engine etc  i have seen a few reports on this product ,but anyone with first hand info thanks kev

Wouldn't bother personally unless you have a problem. Have heard good and bad things  about engine additives. Its your choice though but sometimes a good oil change can be just as benifical as adding additives.