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.Duty & taxes paid at delivery

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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

🔥Reduces friction & wear at startup

⚙️Boosts Zinc & Phosphorus levels

🛡️Protects engine components

€ 34.16

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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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 performance.
EXTENDED ENGINE LIFE - Clings to bearings and valve train components where regular oil can’t reach, ensuring maximum lubrication.
ULTIMATE ENGINE SHIELD - ZDDP additive boosts zinc & phosphorus to protect critical engine parts from wear and tear.
THERMAL STABILITY BOOST - High-performance formula stabilizes oil viscosity, preventing breakdown under extreme conditions.
UNIVERSAL FIT MADE IN USA - Compatible with all car types and proudly manufactured domestically for trusted quality.

Bar's Leaks Rislone 4405 is an 11 oz concentrated engine oil supplement enriched with zinc dialkyldithiophosphate (ZDDP) and phosphorus additives. Designed to reduce friction, prevent piston scuffing, and stabilize oil viscosity, it protects vital engine components like camshafts and lifters, especially during startup. Compatible with all vehicles, this high-performance formula extends engine life by enhancing lubrication where standard oils fall short.

Specifications

ASIN	B0075559UY
Automotive Fit Type	Universal Fit
Best Sellers Rank	#9,441 in Automotive ( See Top 100 in Automotive ) #23 in Engine & Oil Fluid Additives #164 in Motor Oils
Brand Name	Rislone
Compatible with Vehicle Type	Car
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (2,204)
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 Fluid Ounces

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