Millers Oils Diesel System Cleaner Protect - 3x400ml

For best results and continuous protection, it is recommended to use one bottle every 3-6 months or every 3,000-5,000 miles as part of your regular maintenance schedule.

Yes, this product is specifically designed to be safe and effective for all diesel engines, including those fitted with a Diesel Particulate Filter (DPF).

The cetane number indicates how quickly diesel fuel ignites under compression. Increasing the cetane number (up to 4 numbers with this product) improves combustion efficiency, leading to smoother running, easier starting, and reduced emissions.

No, this is a maintenance and cleaning product. It is designed to optimize the performance of a healthy engine and prevent buildup. It cannot repair mechanical failures or severe damage.

Each bottle contains 400ml of the Diesel System Cleaner Protect.

It is best to add the cleaner first, then the fuel. If fuel is added first, add the cleaner on top; the fuel agitation during driving will help mix it, but direct addition before fueling ensures optimal initial dispersion.

Ensure the product was added correctly before filling the tank. Consistent use over several tankfuls is often required to see the full benefits. Engine issues may be mechanical and require professional diagnosis.

While rare, a sudden change in combustion characteristics can sometimes trigger sensors. Consult your vehicle's manual or a mechanic to diagnose the specific warning light. Ensure the correct product was used for a diesel engine.

Always add the cleaner to an *empty* or *near-empty* tank *before* filling with diesel. This allows the fuel being pumped into the tank to mix the cleaner effectively.