Quick answer
Most DPF cleaners are poured directly into the fuel tank. You measure the recommended dose, empty it in before refuelling, then fill up as normal so it mixes thoroughly. Follow product instructions for frequency and dosage.
Detailed answer
DPF cleaner additives typically come in a small bottle designed for easy pouring. The main idea is that they enter the fuel system, help lower the soot ignition temperature, and assist your diesel in regenerating the filter. Here’s a straightforward guide:
1. Read the Label
Different brands have different instructions—some want you to pour the additive into a near-empty tank, others don’t mind if it’s half-full. They’ll specify the recommended dose (e.g., 250 ml per 50 litres of diesel). Exceeding this might not be helpful and could even lead to suboptimal combustion.
2. Choose the Right Moment
The best time to pour the cleaner is usually right before you fill up with diesel. That way, fresh fuel swirling in will mix the additive thoroughly. If your tank is nearly empty, you’ll ensure the correct concentration once you top up.
3. Open Your Fuel Filler Cap
Obviously, you need access. Make sure the environment is safe—no open flames or lit cigarettes around. Some modern cars have anti-siphon flaps, but usually, you can slip the additive bottle nozzle in with no issue.
4. Pour Slowly
Tilt the bottle gently, letting the fluid drain into the tank. Shake the last few drops if needed—some solutions can be slightly viscous. Then set the empty bottle aside. If you splash a bit on the paint, wipe it off quickly, though these products aren’t typically as corrosive as petrol.
5. Refuel
Immediately add your usual diesel. The incoming fuel’s turbulence helps distribute the cleaner throughout the tank. If the label suggests a certain volume—say “one bottle per 50–60 litres”—try to stick close to that ratio.
6. Drive Normally (But Complete a Regen)
Some instructions encourage a motorway run soon after to help the additive do its job. Keep in mind it’s not an instant fix for a heavily clogged filter. The additive gradually assists regeneration as you drive. If your car is near the threshold for an active regen, the presence of the cleaner can help it burn off soot at slightly lower temperatures.
7. Observe Results
Watch for improvements: fewer DPF warnings, smoother acceleration, or a slight bump in MPG. If you’re still getting dash lights or limp mode, your filter may be beyond what an additive can handle. Consider forced regen or professional cleaning.
8. Frequency
Most brands recommend adding it every 3,000–5,000 miles or at major service intervals. Follow the product’s instructions. Overusing it might be a waste of money, and underusing might not yield benefits.
Overall, putting DPF cleaner in your car is straightforward: measure, pour, refill with diesel, and drive. The trick lies in choosing a quality product, using it at the recommended intervals, and ensuring your driving routine allows for proper regeneration. With a bit of diligence, you can help keep that DPF soot-free and your diesel running strong.
