Will it work with car being stationery

Yes but i wouldn't burn a whole tank of fuel stationary. If you mean just while in traffic, yes as long as the engine is running.

when do you put it in?empty tank or anytime

It states to wait until tank is nearly empty then add immediately (ie at Petrol station and without starting the engine) before filling with approx 40-80 litres of diesel per full 430ml of additive. I used half in 40 litres

Is it recommended for EGR cleaning ?

Not sure if it cleans EGR But works incredibly great for turbo,DPF,and cat , best on market does what it says

How often can it be used as i do 600 mile a week and first one made a difference

It takes probably around 10 to 20 thousand miles for the carbon to build up in places like the EGR (exhaust gas recirculation valve ) if yours has never had this treatment you will have possibly noticed a difference before and after? Hope that’s a help

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– AR6400-D MAX Pro DPF Cleaner Diesel - Diesel Injector and Particulate Filter Treatment - Fuel System Cleaner - EGR, Turbo and Emissions Additive for MOT Pass - 400ml Concentrate

Product ID: 53037545

⛽Improves fuel economy year-round

🔥Boosts combustion & reduces smoke

⚙️Comprehensive fuel system cleaner

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Description

⚡ Unlock your diesel’s hidden power and drive cleaner, smoother, smarter!

SMOKE FREE POWER BOOST - Rapidly cuts harmful emissions & exhaust smoke for cleaner, smoother rides
FUEL ECONOMY GAME CHANGER - Proprietary additives enhance mileage and restore lost engine efficiency
TOTAL DIESEL SYSTEM DETOX - Cleans injectors, EGR, DPF, turbo & fuel lines for peak engine health
TRUSTED PRO GRADE FORMULA - Backed by a decade of success & performance guarantee for peace of mind
ADVANCED ESTER LUBRICATION - Includes high-purity cetane improver & ester lubricants for superior engine protection

Archoil AR6400-D Max Diesel Additive is a professional-grade fuel system cleaner designed to thoroughly clean diesel injectors, EGR valves, DPF, turbochargers, and fuel lines. It reduces harmful emissions and exhaust smoke while restoring engine responsiveness and improving fuel economy. Featuring a proprietary blend with cetane improvers and ester lubricants, it ensures smoother engine operation and long-term protection. Trusted by professionals and backed by a performance guarantee, it’s the essential maintenance upgrade for any diesel vehicle aiming to maintain peak performance and efficiency.

Specifications

ASIN	B00KQ1ALKC
Best Sellers Rank	668 in Automotive ( See Top 100 in Automotive ) 21 in Fuel Systems
Brand	Archoil
Customer Reviews	4.5 4.5 out of 5 stars (1,653)
Date First Available	2 April 2021
Delivery information	We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
Item Weight	431 g
Item model number	FBA_AR6400-D
Manufacturer	Archoil
Manufacturer part number	AR6400-D 430
Model	AR6400-D MAX
Product Dimensions	20.32 x 20.32 x 20.32 cm; 430.91 g

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