Does it work on Diesel engines

Yes worked in my van, I also use the oil supplement at 5 to one, ie 1 qrt lucas oil to 4 quarts engine oil or same for gearbox, really good stuff saved my engine when run out of oil due to burst oil filter seal.

How often should this be used

There is NOT a set answer I believe...I do it ever 3th Oil change (1500miles) on my motorcycle.

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Lucas Oil 40512 Deep Clean Fuel System Cleaner - 473ml

Lucas Oil 40512 Deep Clean Fuel System Cleaner - 473ml

Product ID: 52633528

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Details

Brand
Lucas Oil
Item form
Liquid
Item volume
473
Material Type Free
Material feature
Biobased
Scent
Citrus

⛽Boosts MPG performance noticeably

🌿Reduces NOx emissions effectively

🔥Deep cleans fuel system & combustion chamber

Description

⛽ Clean fuel, smooth ride, smarter drive!

OCTANE FREEDOM - Eliminates the need for higher octane fuel, saving you money
TEST READY CLEAN - Prepares your engine for emissions tests with a deep, thorough clean
ECO FRIENDLY DRIVE - Lowers harmful NOx emissions for a cleaner ride
ENGINE REVIVAL POWER - Eradicates carbon deposits to restore smooth, knock-free performance
FUEL EFFICIENCY BOOSTER - Raises miles per gallon for smarter, cost-effective driving

Lucas Oil 40512 Deep Clean Fuel System Cleaner is a concentrated 473ml formula designed for petrol engines. It deeply cleans the entire fuel system and combustion chamber, removes carbon deposits, eliminates knocking and pinging, raises fuel efficiency, and reduces NOx emissions. Trusted by thousands with a 4.7-star rating, it also helps prepare vehicles for emissions testing while eliminating the need for higher octane fuel.

Specifications

ASIN	B003JTYGPO
Best Sellers Rank	60,743 in Automotive ( See Top 100 in Automotive ) 311 in Fuel Systems
Brand	Lucas Oil
Customer Reviews	4.7 4.7 out of 5 stars (1,287)
Date First Available	22 Sept. 2010
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	170 g
Item model number	10512
Manufacturer	Lucas Oil Products Inc
Manufacturer part number	LUCA10512
Model	10512
Product Dimensions	24.97 x 5.46 x 2.44 cm; 170 g
Special Features	Concentrated

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TrustScore 4.5 | 7,300+ reviews