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⚙️ Power up your engine’s legacy with Zinc ZDDP – because every start counts!
Rislone Zinc ZDDP Supplement is a high-performance oil additive formulated with zinc dialkyldithiophosphate and phosphorus extreme pressure agents. Designed to protect critical engine components like pistons and camshafts, it reduces friction and wear especially during startup, stabilizes oil viscosity against thermal breakdown, and extends engine life. Ideal for older engines using modern oils, this 11oz concentrate is a trusted, USA-made solution for enhanced engine durability.
| ASIN | B0075559UY |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #5,136 in Automotive ( See Top 100 in Automotive ) #13 in Engine & Oil Fluid Additives #106 in Motor Oils |
| Brand Name | Rislone |
| Compatible with Vehicle Type | Car |
| Container Type | Bottle |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,140) |
| 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 |
A**W
Use this zddp for my flat tappet cam 454 must have
Fast shipping good price on this very good zddp
R**K
Works great.
Works great the old tractor wouldn't be without it!
M**N
Must have for classics
I put this in all of my classic vehicles for the added ZDDP. Add to every oil change. Since using, I’ve noticed a quieter valvetrain. 10/10 recommend
R**S
Haven't noticed a huge difference but hopefully we'll extend longevity of my engine.
Seems to be doing pretty good. Haven't noticed a significant change in engine noises but for old '90s and '80s engines that were designed with zinc in the oil, it makes me feel better to believe this is helping my engine last longer than just putting synthetic oil in.
D**E
Engine Oil Supplement
Great Product
J**R
Has what old engines crave
This lets me use regular modern 5w30 low zinc oil in an old 80s 350 engine without having to buy different types of oils. Follow label instructions, do not over dose.
L**Y
Great product
Great additive for old school engines, has zinc additive and have used for years.
G**R
I use this as directed for my 1999 Jeep 4.0L
I use this as directed for my 1999 Jeep 4.0L. Lots of critics on if its really needed, but as far as I am concerned, its better than finding out later Zinc was needed. Priced okay, hoping it works, I use it with semi-synthetic Pennzoil. I have 179,000 miles and still rolling.
T**J
My wife and I have been experimenting with various lubes. Some we have tried have dried quickly causing a rash, some have started smoking after prolonged shaft vibration. Care is needed with this as the added zinc reduces friction so much, one sneeze and you can find yourself across the room in full flight.
E**N
Beaucoup plus facile d'utilisation que l'ancienne formule
D**N
I filled suggested amount per instructions. Used a syringe, on my 2015 corolla. Noticed, my idling dropped from 1000rpm to about half ,600rpm combined with a lower viscosity 0w16 oil. Although, it's not a large sample size. I can say, it does work, per my vehicle.
R**E
Just fine
R**Y
Use this in my ram
Trustpilot
1 month ago
5 days ago