BARDAHL 120018 TOP DIESEL+ 250 ML - Multifunctional Diesel Additive, treats one full tank

Capacity: 250 ml

BARDAHL 120018 – TOP DIESEL+ 250 ML

Bardahl Top Diesel+ 120018 is the multifunctional diesel additive in the 250 ml pack: one bottle treats a full tank of about 60 litres. It cleans the fuel system, lubricates the pump and injectors and raises the cetane number. It is designed for drivers who want to do preventive maintenance on their diesel and for workshops that recommend it at service time.

What it is for

Bardahl recommends Top Diesel+ when the car shows one or more of these symptoms:

• irregular idle;
• poor performance;
• hard starting;
• black exhaust smoke;
• higher fuel consumption.

The possible causes listed by Bardahl are dirt building up in the fuel system, biodiesel or low-quality fuel, water in the fuel and the poor lubricity of diesel, which over time wears the injectors and high-pressure pump.

Benefits

• ✅ Cleans deposits from the fuel system and prevents new ones from forming
• ✅ Keeps injector holes clear for correct diesel atomisation
• ✅ Lubricates the high-pressure pump and injectors
• ✅ Protects the system over time from the effects of water (corrosion and rust)
• ✅ Raises the cetane number and stabilises the fuel
• ✅ Improves engine efficiency, helping to save fuel and reduce polluting emissions

Dosage and directions

• Standard treatment: one 250 ml bottle in a full tank of diesel (about 60 litres).
• Frequency: every 2-3 fill-ups or at least every 4,000-5,000 km.
• Stubborn deposits or loss of performance: Bardahl allows two consecutive treatments.
• Power Boost: 1 litre of product in one full tank gives immediate cleaning and, according to Bardahl, a power gain of up to 1.7%. For this use there is the Bardahl 120039 Top Diesel+ 1 L size.

Add the bottle to the tank when you fill up.

Technical specifications

• Brand: Bardahl
• Product code (MPN): 120018
• Line: Top Diesel+ (COD 120)
• Size: 250 ml bottle
• Dosage: 250 ml for about 60 litres of diesel
• Frequency: every 2-3 fill-ups or at least every 4,000-5,000 km
• Type: multifunctional diesel additive (cleaning, lubricating, anti-corrosion, cetane improver)
• Compatibility: all diesel engines, naturally aspirated and turbocharged, common rail and unit injector

Compatibility

Bardahl states that Top Diesel+ is suitable for all diesel engines, naturally aspirated and turbocharged, with indirect or high-pressure direct injection (common rail and unit injector). Use with diesel fuel only: Bardahl offers dedicated products for petrol engines.

When it does not help: an additive cleans and protects but does not repair an injector with a mechanical or electrical fault, nor an already damaged pump. If the ECU reports an injector fault, a workshop diagnosis is needed first.

Pair it with

• Bardahl 122031 Diesel Injector Cleaner 500 ml: concentrated shock treatment for the injectors, to alternate with maintenance.
• Bardahl 113018 DPF Cleaner 250 ml: keeps the particulate filter clean, useful if you make lots of short trips.
• Bardahl 120039 Top Diesel+ 1 L: the same product in the 1-litre size, for more treatments or for the Power Boost.

Frequently asked questions

How much diesel does one bottle of Bardahl Top Diesel+ 120018 treat?
One 250 ml bottle of Bardahl Top Diesel+ treats a full tank of diesel, about 60 litres.

How often should I use Bardahl Top Diesel+?
Bardahl recommends one treatment every 2-3 fill-ups or at least every 4,000-5,000 km to keep the fuel system clean and lubricated.

Can Top Diesel+ be used twice in a row?
Yes. With stubborn deposits or loss of performance, Bardahl allows two consecutive Top Diesel+ treatments.

Is Top Diesel+ suitable for modern common rail diesels?
Yes. Bardahl states it is suitable for all diesel engines, naturally aspirated and turbocharged, with indirect or high-pressure direct injection, including common rail and unit injector.

Does Top Diesel+ help with black exhaust smoke?
Black smoke is one of the symptoms for which Bardahl recommends Top Diesel+, when it comes from dirt in the fuel system. If black smoke has other mechanical causes, the additive will not solve it and a diagnosis is needed.

Can Top Diesel+ be used with biodiesel?
Yes. Bardahl specifically lists biodiesel and low-quality fuels among the causes of fouling that Top Diesel+ counteracts.

What is the difference between Top Diesel+ and the Bardahl Diesel Injector Cleaner?
Top Diesel+ (COD 120) is a multifunctional maintenance treatment: it cleans, lubricates, protects against water and raises cetane, with 250 ml per full tank every 2-3 fill-ups. The Diesel Injector Cleaner (COD 122) is a concentrated shock treatment for the injectors: 500 ml in 20 litres of diesel, every 5,000 km or before the emissions inspection.

What is the difference between Top Diesel+ and the 5-in-1 Diesel Cleaner?
Top Diesel+ keeps the fuel system clean and lubricated. The 5-in-1 Diesel Cleaner (COD 166) is a concentrated cleaning treatment that, beyond injection, also works on valves, turbo, EGR valve, DPF and catalytic converter.

What is the difference between the 250 ml and 1-litre sizes?
It is the same product. The 250 ml (120018) is the dose for one tank; the 1 litre (120039) is for several treatments or for the Power Boost treatment in a single tank.

Does Top Diesel+ protect diesel from freezing in winter?
No, it is not an anti-gel. For cold weather Bardahl offers Hot Fuel (COD 121), which inhibits the formation of paraffin crystals in diesel.

Does Top Diesel+ repair a leaking or non-spraying injector?
No. An additive cleans deposits and lubricates, but does not fix mechanical or electrical faults: those need a workshop diagnosis.

Why buy from Autoricambi Tritella

Since 2007 we have supplied workshops and drivers through 4 stores in the province of Teramo, Italy (Giulianova, Mosciano Stazione, Roseto degli Abruzzi, Nereto). Genuine Bardahl products, fast shipping and technical support: if you are unsure which product suits your car, contact us before buying.