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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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Zinc ZDDP Supplement

Product ID: 5268581

Details

Brand
Rislone
Liquid Volume
11 Fluid
Package Information
Bottle
UPC
078615044054
Vehicle Service Type
Car

⏳Extends engine life with thermal stability

🔥Reduces friction & wear at startup

⚙️Boosts Zinc & Phosphorus for engine protection

₹ 2136

Duties & taxes included

In stock

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Description

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

FRICTION FIGHTER - Minimizes dry starts and reduces friction for a cooler, longer-lasting engine.
ULTIMATE ENGINE SHIELD - ZDDP zinc and phosphorus additives protect critical engine parts from wear and tear.
MADE IN THE USA QUALITY - Trusted, high-performance formula with a strong 4.7-star rating from over 2,000 users.
THERMAL STABILITY BOOST - Prevents oil viscosity breakdown under extreme conditions, ensuring consistent performance.
UNIVERSAL COMPATIBILITY - Works seamlessly with all car engines, making older oils perform like new.

Bar's Leaks Rislone 4405 is an 11 oz engine oil supplement concentrate enriched with ZDDP zinc and phosphorus additives. Designed to reduce friction, prevent piston scuffing, and stabilize oil viscosity, it protects vital engine components and extends engine life. Compatible with all car engines, this high-performance formula is made in the USA and highly rated by thousands of users.

Specifications

ASIN	B0075559UY
Automotive Fit Type	Universal Fit
Best Sellers Rank	#6,858 in Automotive ( See Top 100 in Automotive ) #14 in Engine & Oil Fluid Additives #111 in Motor Oils
Brand Name	Rislone
Compatible with Vehicle Type	Car
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (2,166)
Global Trade Identification Number	00078615044054
Included Components	1 Bottle Rislone 4405 Engine Oil Supplement, 11oz
Item Type Name	Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz.
Liquid Volume	11 Fluid Ounces
Manufacturer	Rislone
Manufacturer Part Number	4405
Manufacturer Warranty Description	No
Model Number	4405
Size	1 Pack
UPC	078615044054
Unit Count	11.0 Fluid Ounces

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