I used the Liqui Moly Diesel particulate Filter DPF in my diesel vehicle, and I could feel the improvement almost right away. The engine runs smoother and quieter, with less clatter. Acceleration feels cleaner, and cold starts seem easier too. I like that it protects the fuel system and helps reduce knocking. The 250 mL can is easy to pour straight into the fuel tank, and one treatment already made a difference. Definitely worth keeping on hand for regular maintenance—especially if you want to prolong injector life and keep the engine running at its best. Highly recommended for any diesel owner!