ZDDPPlus ZDDP Engine Oil Additive Zinc & Phosphorus 2 Bottles

Like it

I have been using this product for years now in my older engines with ZERO issues. The one thing I do like is that it is MORE zinc additive ,and LESS other products involved like the larger bottles of Riislone and others. (I am thinking they are adding more oil,and other products unnecessary to theirs. ) Yes, these are only 8 oz bottles,but it is MORE of what you are actually needing.and LESS of other additives you dont need.

Rebuilt my 7.3 PowerStroke out of my 97 F350 back in February, waited to write reviews until I knew my rebuild went good. Used this stuff to assist in making sure my truck got to have the best chance of running good and being broke in smoothly. I couldn’t tell ya how much of a difference this stuff makes or not, but it’s a peace of mind thing and I haven’t had any issues. It was worth it to me to use and I would definitely use it again.

I use this in a circa 1972 Wisconsin THD on a John Deere 24T. Brings the 2024 Castrol 30w into spec for the old girl (her valves want that zinc!). She runs like a charm and doesn’t use a drop of oil. Wish I could say the same for myself, LOL!

Came recommended for flat tapper engines. I added it to my oil. We will see

I put the product in my 1969 muscle car engine.

I know it works fit to my experience. I’ve been a ford mechanic for 44 years. I witnessed the oil transition from ZDDP to non ZDDP. I’ve seen a lot of camshaft destruction on older engines because oil companies removed it. The removal was forced because of emissions. I guess that’s progress.

Works as it should, great deal!