does it contain antigel

The performance does have a antigel the winter formula is for extreme cold weather

Is this compatable with def (diesel exhaust fluid) engines. i'm in ca and have a 2011 duromax.

Like other popular additives on the market, the use does not have any bearing on the use of DEF as the DEF is part of the "after combustion stage" of any modern pick-up truck diesel engine. Stanadyne additive is one of the better additives with regards to helping to keep the injectors lubricated during use which also helps to keep them clean and therefore greatly aides in cooling the injectors which are the 3 components of any good diesel fuel; Fuel for combustian-Lubrication of pumps & injectors-Cooling of Injectors, therefore, longer life expectancy! The idea of increasing the cetane rating might be true for some of the additives one can buy, but that is really not the reason to buy any diesel additive! DEF is injected after the combustion process and only used to help dissolve and burn out any particulate matter being emitted in the exhaust.

How often do you use it? Is every fill up ok?

Yes I use 6oz every fill up it is great for the engine and increases power

What is the dosing ratio of additive to diesel fuel?

.26 ounces per gallon of diesel.

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⛽ Power up your diesel, save fuel, and drive smarter!

INJECTOR GUARDIAN - Protects and cleans injectors to prevent costly repairs
POWER SURGE FORMULA - Unlock extra horsepower for a smoother, stronger drive
RAPID START TECHNOLOGY - Experience faster, hassle-free engine startups every time
FUEL EFFICIENCY MAXIMIZER - Cut fuel costs with improved combustion and economy
ULTRA LOW SULFUR COMPATIBLE - Safe and effective with the latest eco-friendly diesel fuels

Stanadyne Diesel Performance Formula (64 OZ) is a premium additive designed to improve fuel economy, increase horsepower, and protect diesel engine components. Compatible with ultra-low sulfur diesel fuels, it ensures faster startups and cleaner injectors, extending engine life and enhancing overall performance.

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Manufacturer	STANADYNE
Brand	Stanadyne
Product Dimensions	15.24 x 7.62 x 24.13 cm; 1.72 kg
Item model number	5
Manufacturer Part Number	38566
OEM Part Number	38566
Item Weight	1.72 Kilograms

StanadyneDiesel Performance Formula - 64 OZ. by

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