Rislone 4405 Hy-per Lube Zinc ZDDP Supplement, 1-Pack, 11 oz

Good quality

This product is a must for preserving newer motors. Without this additive, camshafts can wear down prematurely.

I never knew my older chevy collection needed this additive. Engine runs much more quiet now. Excellent product.

I bought this for the older car we use for family errands, since I wanted a zinc supplement intended for engines that need it. I added it during a weekend oil change, with the car parked in the driveway and my kid asking when we could go for a ride. I handled the 11-ounce bottle easily, and the label tells me what it’s for, so I didn’t have to guess at the shelf. The engine ran normally after the change, which is what I wanted. I’m glad I had it on hand while sorting out oil for an older engine. Just check that it suits your setup before adding it.

This Rislone 4405 Hy-per Lube Zinc ZDDP supplement (11oz) is exactly what I needed for my vintage flat tappet V8. Modern low-zinc motor oil risks wearing down camshafts and lifters on older engines, and this additive brings zinc levels back to the proper range. It mixes easily with both conventional and synthetic oil with no separation. I added it during my recent oil change, and startup noise from the valvetrain quieted noticeably. It delivers real zinc and phosphorus for extreme-pressure protection, guarding cam, lifters and pushrods. The 11oz bottle is sized perfectly for a typical engine oil change. It’s a trusted staple for hot rods and classic car owners. If you run modern oil in older engines, this product is essential to prevent expensive valvetrain damage. I will keep this in my shop and repurchase

Great for new or rebuilt engine initial start and break in

This zinc supplement went into my older truck’s oil before a weekend hike. I bought it to give the engine a bit of extra support, and I added it in the trailhead lot while the coffee was still hot. The truck started up smoothly afterward, which made me glad I brought it along.

I grabbed this ZDDP stuff for my 2001 Tacoma before a weekend camping run into the woods. I just pour it in with fresh oil and the valve train quiets down a bit. On the climb to the trailhead it felt smoother. I am glad the little bottle fits right in my glove box.

Beaucoup plus facile d'utilisation que l'ancienne formule

Great product.

Use this in my ram

Just fine

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.