There is no mention of it being safe for cat converters, etc.

This product is safe to be used on any of the following equipment:Automatic and manual transmissions for passenger cars, trucks, Sport Utility vehicles, construction equipment, railroad, marine vessels and military.Diesel EnginesDifferentials and gear boxes.Bearings and bearing journals.Power steering units & PumpsAir compressorsCooling systemsHydraulic power systems in Heavy duty off road equipment and Farming machineryMining and smelter equipmentRailroad equipmentOil and Water wellsDrilling equipmentMachine shops equipment: grinding, drilling milling etc.

simple always read the label ... 2 oz / 15 gallons. when you fill up add 2 oz / 15 gallon before you pump. Don't worry about being exact in this case more is good and for car size tanks i don't think it matters whether you add before or after pumping. I'm not a representative of Polytron, this how i use it. I'm always leary of these type of products but i think this is the real deal. I notice improvements immediately after i added Polytron GDFC to my fuel: smoother running, better take offs and better MPG however the first time i added GDFC I am using it instead of Stanadyne OEM additive for lubricity since the fed's saw fit so remove sulfur(extreme pressure agent) from diesel. Similar immediately noticeable results from oil additive.

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Description

⚡ Power up your ride with Polytron’s elite fuel conditioner!

HEAVY DUTY DURABILITY - Rugged PVC casing built to withstand tough conditions
PLUG PLAY CONVENIENCE - No assembly required—just add and go for instant fuel conditioning
BOOST YOUR ENGINE EFFICIENCY - Optimized fuel flow for smoother rides and better mileage
COMPACT LIGHTWEIGHT DESIGN - Easy to store and handle at just 336g and small size
MADE WITH PRECISION IN THE USA - Trusted Polytron quality ensuring reliability and performance

Polytron’s Fuel Conditioner is a 12 fl oz, heavy-duty fuel additive designed to enhance engine performance and fuel efficiency. Featuring a durable PVC outer shell and compact design, this USA-made product delivers reliable conditioning with easy, no-assembly use.

Specifications

Manufacturer	polytron lube U.S.A
Brand	Polytron
Product Dimensions	3.3 x 8.26 x 21.59 cm; 335.66 g
Item model number	fuel
Manufacturer Part Number	Polytron GDFC 12oz
Volume	12 Fluid Ounces
Inner Material	fuel oil
Outer Material	pvc
Material	pvc plastic
Size	Small
Colour	Brown
Stain Resistant?	No
Assembly Required	No
Special Features	heavy duty
Voltage	12 Volts
Manufacturer	polytron lube U.S.A
Country of Origin	India
Item Weight	336 g

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