HIGHTEC Diesel System Cleaner Ultra is a concentrated fuel additive that cleans the entire diesel injection system in a single treatment. Its active cleaning package removes deposits from valves, injectors and the combustion chamber, restoring spray patterns and combustion efficiency. The result is lower emissions, reduced fuel consumption and smoother engine performance.

Purpose and specifications

This additive is formulated for all modern and older diesel engines, including sensitive common-rail and pump-injector units. As a universal maintenance product it carries no vehicle-specific OEM approvals and suits mixed diesel fleets. It reduces emissions and consumption, protects against corrosion throughout the fuel system and improves engine response.

• 0.250L container, sufficient to treat one full tank of up to 50 liters of diesel
• Stable performance across normal operating temperatures, working continuously while you drive
• Cleans injectors and combustion chamber while adding corrosion protection to metal fuel-system parts
• Restores fuel economy and engine power by clearing carbon and resin deposits

When to use / change?

Use this cleaner as a preventive treatment roughly every 5,000 km or when you notice rough idling, reduced power or rising consumption. Add the contents to the tank before refueling and the additive works during normal driving. It performs reliably across a wide operating temperature range. Shelf life is approximately 5 years when the container is kept sealed in a cool, dry place.

Frequently asked questions

How often should I use this cleaner?
As a maintenance dose, add one bottle every few thousand kilometers; for a heavily fouled system, use it on several consecutive tank fills.

Is it safe for diesel particulate filters and catalysts?
Yes, it is designed for modern diesels and does not harm exhaust aftertreatment components when used as directed.

Do I add it before or after filling up?
Pour it into the tank before refueling so the fresh fuel mixes the additive thoroughly.

Suitable for: all diesel vehicles, common-rail and pump-injector engines, passenger cars, vans and light trucks. Always verify the exact approval against your vehicle's owner manual before use.