Purpose and Specifications

STP Oil Treatment Diesel is a premium engine oil additive designed specifically for diesel engines. This 300 ml treatment fortifies your motor oil with extra detergents, anti-wear agents, and viscosity stabilizers to maintain stable oil thickness in extreme conditions, from cold starts at -20°C to high-heat operation up to 150°C.

It reduces engine deposits, fights corrosion, cuts oil consumption by over 50%, and provides superior protection for pistons, rings, and turbo components in all diesel vehicles, old or new. Regular use extends overhaul intervals up to 50,000 km and keeps your engine running smoother with less wear.

• Cleans and prevents carbon buildup for restored power
• Stops fuel dilution in oil from diesel leaks
• Improves fuel efficiency and reduces smoke
• Compatible with turbo diesels and major oil types

When to Use / Replace?

Add one 300 ml bottle to your engine oil during every oil change, typically every 10,000 km or 12 months. Ideal for high-mileage engines over 75,000 km, cold weather driving, or when noticing increased oil use or smoke. Shelf life is 3 years unopened; replace additive if oil looks dirty. Not for petrol engines.

Frequently Asked Questions

Can I use STP Diesel Oil Treatment in any diesel engine?
Yes, it works great in cars, trucks, buses, and turbo diesels, new or old, to reduce wear and extend engine life.

How often should I add it?
Use with every oil change every 10,000 km or yearly for ongoing protection and to cut oil consumption.

Does it change my oil thickness?
No, it stabilizes viscosity so oil flows easily in cold temps and stays protective when hot, without altering your oil's grade.