I have an 05 6.0L Powerstroke and I am wondering what other powerstroke owners use. How often do you add? I hear some people say every tank others say every other tank. I wana know whats best and also its sometimes -30c where I live so is there one thats better for cold weather? Thanks guys.

 

I was using MARVEL MYSTERY OIL in my 1999 7.3

 

2 stroke oil TCW3 1 oz per gal or one qt with EVERY fill up. Just started running it in mine and it is truly amazing what it does to the way my 6.0 runs.

 

you're going to want to run something with an antigel in it, i'm assuming the additive ford sells with the powerstroke badge is probably ok to use in the fuel and shouldn't harm anything, i don't know though

 

I run the Diesel Kleen with Cetane Boost and have had no problems out of it.

 

Diesel Power Service is all I use. Silver in the spring-fall, white in the winter.