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 Engine Oil Supplement Concentrate - 11 oz

Rislone Engine Oil Supplement Concentrate - 11 oz

Product ID: 220555588

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Details

Brand
Rislone
Vehicle Service Type
Car
UPC
078615044054
Global Trade Identification Number
Manufacturer
Rislone

⏳Extends engine life with advanced lubrication

🔥Reduces friction & wear at startup

⚙️Boosts Zinc & Phosphorous for engine protection

Description

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

FRICTION FIGHTER - Minimizes startup friction to prevent dry starts and reduce engine wear, keeping your ride smooth.
ULTIMATE ENGINE SHIELD - ZDDP additive boosts zinc & phosphorous to protect critical engine parts from wear and tear.
PROUDLY MADE IN THE USA - Quality you can trust, engineered for peak performance and durability.
THERMAL STABILITY BOOST - High-performance formula stabilizes oil viscosity, preventing piston scuffing and thermal breakdown.
LONG LASTING LUBRICATION - Clinging action ensures bearings and valve train components stay lubricated where regular oil fails.

Rislone Engine Oil Supplement Concentrate is a premium 11 oz additive formulated with ZDDP zinc and phosphorous EP additives to protect vital engine components. It reduces friction and wear, especially during startup, stabilizes oil viscosity to prevent piston scuffing, and extends engine life by enhancing lubrication where standard oils fall short. Made in the USA, it’s the smart choice for professionals who demand reliability and performance.

Specifications

Brand	Rislone
Vehicle Service Type	Car
UPC	078615044054
Global Trade Identification Number	00078615044054
Manufacturer	Rislone
Size	1 Pack
Model	4405
Product Dimensions	4.57 x 7.62 x 16.76 cm; 340.19 g
Item model number	4405
Manufacturer Part Number	4405
Colour	Yellow
Assembly Required	No
Country of Origin	USA
Item Weight	340 g

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