ZDDPlus contains the exact concentration (approximately 0.15%) of ZDDP (Zinc DialkylDithioPhosphate) that was available in motor oils under the “SF” category. The motor oils today carry the “SM” category designation. Today car manufacturers must warranty their catalytic converters for 100,000 miles or more. In order to meet this requirement, oil companies have had to eliminate the ZDDP older muscle cars need to protect their flat-tappet cams. ZDDP is not an issue of concern for modern vehicles with roller rockers. The issue arises with older performance cars with flat-tappet camshafts. ZDDP has been an important additive in engine oils for over 70 years and has had an excellent track record at protecting the sliding metal-to-metal cam lifter interface. ZPPD protects by creating a film on the cams and flat lifter contact points in response to the extreme pressure and heat at the contact point.
| Manufacturer | ZDDPlus |
| Is Discontinued By Manufacturer | No |
F**A
Peace of Mind if you own an old car.
I own an old 1964 Ford Falcon convertible with a 302cid 4V V8,it has a flat tappet(non-roller lifter) hydraulic cam in it. Now that the Federal Government and EPA have mandated reducing and eliminating the anti-wear additive Zinc dialkyldithiophosphates (often referred to as ZDDP) from our motor oils this product gives me peace of mind that I can enjoy my old cars with out worrying about camshaft and lifter failures caused by new motor oil that is not meant for older cars anymore. Even the Shell Rottella 15w-40 diesal oil has reduced ZDDP levels now. ZDDP is supposedly reported to build up in the catalytic converters causing them to fail. ZDDPPlus ZDDP Engine Oil Additive Zinc & Phosphorus 3pk
D**M
ZDDPlus works great.
You can have too much ZDDP in your oil. It will mess up your oil if you do.Using this product means you will not add too much. Following the instructions makes sure you have just the right amount. VERY easy to use.
A**R
Good
Works as expected
J**.
Five Stars
i guess it works, i don't really know; just been told it's a must in my 1957 .283 engine
W**3
Five Stars
If you have a pushrod car and a performance engine, you want this.
A**R
Five Stars
This is the stuff every classic car owner needs.
G**E
Five Stars
use this in both of my muscle cars
Trustpilot
2 days ago
4 days ago
