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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STANADYNE DIESEL PERFORMANCE FORMULA - 64 oz

STANADYNE DIESEL PERFORMANCE FORMULA - 64 oz

Product ID: 724905388

Details

Brand
Stanadyne
Liquid Volume
64 Fluid
Package Information
Bottle
UPC
753167924442
Vehicle Service Type
Bus Truck

⛽Boosts fuel economy

⚙️Restores engine power

🛡️OEM-approved protection

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863.96 DT

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Description

🛠️ Unlock Peak Diesel Power & Protection — Don’t Let Your Engine Miss Out!

MIX MATCH WITHOUT RISK - Safe to blend with other Stanadyne additives—double dose, double confidence.
YEAR ROUND ENGINE SHIELD - All-season formula protects against fuel-related issues no matter the climate.
POWER CLEANLINESS IN ONE - Exceeds Cummins L10 cleanliness standards to keep injectors pristine.
TRUSTED BY INDUSTRY LEADERS - OEM-approved by GM, Ford, Deere, and Navistar for guaranteed compatibility.
MAXIMIZE YOUR DIESEL EFFICIENCY - Handles up to 240 gallons per 64 oz bottle for long-lasting performance.

Stanadyne Diesel Performance Formula is a premium 64 oz additive designed to enhance diesel engine performance by improving fuel economy, horsepower, and torque. Approved by major OEMs like GM and Ford, it cleans fuel injectors beyond Cummins L10 standards and protects engines year-round. One bottle treats up to 240 gallons of diesel, making it a trusted choice for buses and trucks seeking reliable, all-season fuel system care.

Specifications

ASIN	B000M5QPSY
Amazon Bestseller	#868,385 in Automotive ( See Top 100 in Automotive ) #76 in Diesel Additives
Brand	Stanadyne
Brand Name	Stanadyne
Compatible with Vehicle Type	Bus, Truck
Container Type	Bottle
Liquid Volume	64 Fluid Ounces
Manufacturer	Stanadyne
Manufacturer Part Number	38566
Package Information	Bottle
UPC	753167924442 026508385661
Unit Count	64.0 Count
Vehicle Service Type	Bus, Truck

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863.96 DT

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In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

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