is this good for modern cars? whats zddp for

Answers one and two are correct. Older engines (classic cars for the most part) with older style tappets. This is an oil additive. Has nothing to to with fuel system ant Cats. nor is their any such precaution from the manufacturer.

Can you use it with syntetic oil?

Yes, Rislone is compatible with and works with all petroleum-based motor oils including conventional, high mileage and synthetic formulas.Eric

Can you use this in atv engines?

Yes..... It is compatible with all motor oils..... and engines..... Use an appropriate amount... Smaller engines of course wouldn't need the entire bottle at once.

How much zinc is in this? The back of the bottle does not tell you the numbers only oil dilutions directions.

Its enough zinc to protect your engine from excessive friction, for one oil cycle or 3000 miles.

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Rislone 4405 Hy-per Lube Zinc ZDDP Supplement, 11 oz. | Real ZDDP Zinc Additive

Rislone 4405 Hy-per Lube Zinc ZDDP Supplement, 11 oz. | Real ZDDP Zinc Additive

Product ID: 5268581

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Details

Brand
Rislone
Vehicle Service Type
Car
UPC
078615044054
Automotive Fit Type
Universal Fit
Global Trade Identification Number

🔥Reduces friction & wear at start-up

⚙️Boosts Zinc & Phosphorus EP levels

🛡️Protects engine components from scuffing

Description

🛠️ Power up your engine’s lifespan with every drop!

FRICTION FIGHTER - Minimizes wear during cold starts to extend engine life and performance
MADE IN THE USA QUALITY - Trusted craftsmanship ensuring reliable, high-performance engine care
THERMAL STABILITY BOOST - Prevents oil viscosity breakdown under high heat for consistent lubrication
EXTREME PRESSURE PROTECTION - ZDDP additive shields pistons, camshafts & valve train for peak durability
UNIVERSAL ENGINE COMPATIBILITY - Works seamlessly with modern oils to revive older engines

Rislone 4405 Hy-Per Lube Zinc ZDDP Supplement is a high-performance petroleum oil additive enriched with zinc dialkyldithiophosphate and phosphorus EP agents. Designed to reduce friction, prevent piston scuffing, and stabilize motor oil viscosity, it protects critical engine parts like pistons, camshafts, and lifters—especially during start-up. Compatible with modern oils, this 11 oz. universal fit formula extends engine life and ensures cooler, smoother operation, proudly made in the USA.

Specifications

Brand	Rislone
Vehicle Service Type	Car
UPC	078615044054
Automotive Fit Type	Universal Fit
Global Trade Identification Number	00078615044054
Manufacturer	Rislone
Size	1 Pack
Model	4405
Item Weight	12 ounces
Product Dimensions	1.8 x 3 x 6.6 inches
Item model number	4405
Is Discontinued By Manufacturer	No
Manufacturer Part Number	4405

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