How to Use a Fuel Injector Cleaner (BG 44K and Others): Steps and How Often

Quick answer: Pour the whole bottle into a nearly empty tank, then fill up straight away with the amount of fuel stated on the bottle (one can of BG 44K treats up to about 75 litres), and drive normally until the tank is almost empty. Repeat about every 10,000 to 15,000 km or as the product instructions say.

When do you need an injector cleaner?

• Slight shaking or an unstable idle.
• Weak torque or hesitation when accelerating.
• Higher fuel consumption for no obvious reason.
• Hard starting in the morning.
• As preventive maintenance, especially on GDI direct-injection engines.

Step-by-step

1. Wait until the tank is low (a quarter or less).
2. Pour in the whole bottle before filling, so it mixes fully with the fresh fuel.
3. Fill up with the amount the bottle specifies. Do not add cleaner to a full tank, as it will be too diluted.
4. Drive normally, ideally including a highway trip, until the tank is nearly empty.
5. Fill up with regular fuel afterwards. Some drivers feel a difference after the first tank; most notice it after two.

How often should you use it?

BG 44K Platinum Fuel System Cleaner 325 ml

Figures are approximate; the product label is the reference.

Common mistakes

• Using two bottles in one tank hoping for a stronger result: it does not help and may harm sensors.
• Adding cleaner to a full tank, which dilutes it.
• Expecting it to fix a mechanically failed injector. Cleaner removes deposits but will not fix a damaged injector or a bad coil.
• Forgetting that GDI engines build carbon on intake valves that fuel never reaches. Details in: Carbon build-up in GDI engines.

For a comparison of cleaners and MAF and catalytic converter cleaning, read: Cleaning the MAF sensor, injectors and catalytic converter.

Recommended products from CarBoost

BG GDI Fuel Kit (3 bottles)

• BG 44K Platinum Fuel System Cleaner 325 ml
• Liqui Moly Injection Cleaner 300 ml
• Red Line Complete Fuel System Cleaner 443 ml
• BG GDI Fuel Kit (3 bottles)
• All in-tank injector cleaners

FAQ

Can injector cleaner harm the engine?

Well-known cleaners such as BG and Liqui Moly are safe for the engine, sensors and catalytic converter when used at the correct dose.

Do I use it with 91 or 95 octane?

It works with both. Use the octane your manufacturer recommends.

Can I use it in a diesel?

No. Use a dedicated diesel cleaner, as the formula is different.

📲 Does your friend's car shake at idle? Send them this article.

🔧 CarBoost is here to help: shop genuine injector cleaners with delivery across Saudi Arabia and Tabby/Tamara instalments, or book fitting at the CarBoost service center in Jeddah.