"You can add Diesel Tech magazine to the long list of testimonials as we're now believers in Archoil too.
"Improved fuel economy, smoother running engine and no issues with cold starts."
I have not been using long enough to be able to determine how useful it will be. I plan to use for a longer period of time and then determine the usefulness.
Used additive in my Porsche, BMW and my wives Lexus, didn't notice any real difference, continue to use to see if there is any difference
Works great in gasoline engines! Improved the fuel economy on a 2004 4Runner by 12%
I ain't had a problem yet, add it every fuel stop
Top MPG in diesel and gasoline.