"As an owner of a diesel repair shop, I refuse to sell any additive that I have not tried for myself and it also must live up to the product claims. Once I tried the 4+ Fuel Additives, I was blown away at how well they work. 4+ Products are by far the best I have ever tried, and I’ve tried almost all the diesel additives on the market." - CJ Muscha, DAK Diesel LLC
"Many thanks for helping us solve our diesel fuel problems (we could barely get 1000 hours on our filters). We sent out diesel fuel samples to a lab and they told us that we had a high level of asphaltenes, diesel fuel breaking down (black slime) from the heat generated from high pressure common rail injection systems. We followed your advice by double treating our existing inventory with 4+ Premium Conditioner. After using most of our inventory up, we standard treating our fuel at the standard rate (10L treats 22,750 L / 6,010 US gal.). I was cutting open the fuel filters at 1000 hours checking for that black slime and after a couple of filter changes, the black slime disappeared. I then went back to the recommended 1500 hour interval for filter changes." - David Shaw, Enbridge Pipelines (NW) Inc.
Results for Jo Jay Trucking: Jo Jay Trucking Testimonial
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