Sta-bil goes in all my vehicles and each fuel can that is used for small engines and haven't had a problem. I use Marvel mystery oil in my diesels along with a fuel lubricity product due to the low sulphur content in today's diesel fuel. I have used sea foam, best price is walmart, and after using it the rough idle in my Jeep stopped, the 85 mercedes diesel idles better and daughters stalling Suburban doesn't stall anymore when turning on the air conditioner, you decide.
After reading Sam Spade's comments i researched Berrymans and Seafoams MSDS sheets and I was quite surprised with the difference in ingredients. I have always
had a good response with sea foam but I think my choice for my gasoline engines has changed.
