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, 1-Pack, 11 oz

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

R$202

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

START UP SAVIOR - Minimizes dry starts by reducing friction when your engine needs it most
ULTIMATE ENGINE SHIELD - ZDDP additive boosts zinc & phosphorus for superior wear protection
UNIVERSAL COMPATIBILITY - Works seamlessly with newer oils in older engines for versatile use
EXTENDED ENGINE LONGEVITY - Clings to bearings and valve train parts for lasting lubrication
THERMAL STABILITY CHAMPION - High-performance formula prevents oil viscosity breakdown under heat

Rislone 4405 Hy-Per Lube Zinc ZDDP Supplement is an 11 oz concentrated oil additive designed to boost zinc and phosphorus levels, reducing friction and wear especially at startup. Its advanced formula stabilizes motor oil against thermal and viscosity breakdown, protecting critical engine parts like pistons and camshafts. Compatible with all vehicle types, it extends engine life by enhancing lubrication where standard oils fall short.

Specifications

ASIN	B0075559UY
Automotive Fit Type	Universal Fit
Best Sellers Rank	#6,806 in Automotive ( See Top 100 in Automotive ) #15 in Engine & Oil Fluid Additives #110 in Motor Oils
Brand Name	Rislone
Compatible with Vehicle Type	Car
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (2,243)
Global Trade Identification Number	00078615044054
Included Components	1 Bottle Rislone 4405 Engine Oil Supplement, 11oz
Item Highlight	Real Zinc, Makes Newer Oils Work in Older Engines
Item Type Name	Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz.
Item Weight	325 g
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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