Bardahl Diesel Particulate Filter & Turbo Cleaner SpecificationsBardahl DPF & Turbo Cleaner has a concentrated formula based on new synthesis technologies to clean diesel engine parts effectively and without dismantling. This product eliminates the soot and carbon deposits that cause turbos to seize up and lowers the combustion temperature of particles in the DPFs. Packaged in a 1L bottle with 300 ml free it extends the life and smooth operation of the turbo and DPF.How to use: Wait for the low engine light to come on. Pour the contents of the bottle into the tank then add 25 litres of fuel. Drive for 25 minutes at an engine speed of 2 500 to 3 500 rpm then drive normally until the treated fuel is used up in one or more trips. Refuel as normal.