I have the same problem as most 6.0 powerstroke owners with my truck running rough when its cold so I ordered 8 oz of rev x additive off of eBay I showed up yesterday I just had the oil changed so I put it in and drove to the store and back about 10 miles so this morning without even thinking about it I started it up and headed off to work it took me a few seconds to realize it wasn't shaking and stuttering it was running smooth just like it did when it was new I know people say its a band aid but wow the question is will it last

 

I believe you will have to add the additive at each oil change or the symptoms will return shortly after the next oil change.

 

Do you have to put 8 oz in or 4 oz after the first time I seen archoil has a similar product that's cheaper but I think it's 16 oz per oil change it almost seems to good to be true when it works that fast

 

I am unsure. Don't have a 6.0, never wanted one and have no desire to ever want one.

I do remember on here when they first came out with this product people used 2 bottles, not sure on the size, on the first change with it, and 1 bottle each change after. there are likely many different products that work, just finding them and trying them to verify they will work for you.

 

Thanks these engines have a bad rap there like a prom queen high maintance but try hard if you look after them I live in Ontario Canada and for some reason know ones seems to know about theses additives