My cousin gave me Techron Diesel and on its bottle neck is 19079. Is it made in 2019?

Doesn't really matter as this stuff is stable over long periods of time. FUEL is what you have to worry about aging out.

Does this also help clean out the exhaust system? such as the egr valve and dpf

No, it’s for fuel injectors and fuel lines clog cleaning

Emulsifier or demulsifier?

My best non professional answer is an emulsifier.

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Techron D Concentrate Diesel Fuel System Cleaner, 20 oz., Pack of 1

Product ID: 68460321

Details

Brand
Chevron
Item Form
Liquid
Material Feature
Unscented
Scent
Unscented
Specific Uses For Product
Engine

⛽Cleans entire fuel system deposits

⚙️Restores cetane boost for better combustion

❄️Improves cold starting & engine responsiveness

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€ 43.80

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⛽ Drive cleaner, start stronger, and stay ahead of the pack!

COLD START SAVIOR - Improves engine responsiveness and drivability even in the chilliest conditions.
PREVENTATIVE ENGINE PROTECTION - Regular use prevents fuel injector sticking and costly failures, extending engine life.
UNIVERSAL DIESEL COMPATIBILITY - Works seamlessly with all diesel types including ultra-low sulfur and biodiesel blends.
ULTRA EFFECTIVE DEPOSIT CLEANER - One-tank treatment cleans pre-existing diesel injector deposits for peak engine health.
CETANE BOOST FOR CLEANER COMBUSTION - Restores cetane levels to reduce emissions and enhance fuel efficiency.

Chevron Techron D Concentrate is a premium diesel fuel system cleaner designed to remove deposits, restore cetane boost, and improve cold starts. Compatible with all diesel fuels including biodiesel blends, this 20 oz concentrated formula treats up to 35 gallons and is recommended every 3,000 miles to maintain engine performance and prevent injector failure.

Specifications

ASIN	B074JMSM96
Best Sellers Rank	#22,240 in Automotive ( See Top 100 in Automotive ) #46 in Diesel Additives
Brand Name	Chevron
Contains Liquid Contents?	Yes
Customer Reviews	4.7 4.7 out of 5 stars (367)
Global Trade Identification Number	00023968377199
Included Components	complete diesel fuel additive
Item Form	Liquid
Item Type Name	Fuel System Cleaner
Item Volume	20 Fluid Ounces
Manufacturer	Chevron
Material Features	Unscented
Model Number	266373272
Number of Items	1
Part Number	266373272
Scent	Unscented
Size	20 Fl Oz (Pack of 1)
Special Features	Concentrated
Specific Uses For Product	Engine
UPC	023968377199
Unit Count	20.0 Fluid Ounces
Warranty Description	Limited Warranty

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