The compound is ZDDP. Oil companies started adding ZDDP (zinc dialkyldithiophosphate) to engine oil back in the 1950s to help reduce wear and tear during engine start-up. Test show on flat tappet cams it reduces bearing and journal wear by a factor of 20. It's that important.
This does not matter on Newer vehicles because most use a roller valvetrain.
According to the EPA and automakers, ZDDP deposits can damage catalytic converters in new cars, reducing their effectiveness as pollution control devices. The zinc bonds to the metal catalyst beads inside the converter, which undermines their purpose. For motor vehicles with catalytic converters (1975-up), it can mean increasing pollution levels from contaminated catalytic converters.
This is especially important when you first break in a flat tappet cam. I have personally seen 6 cars have the cam get wiped withen 500 miles do to the lack ZDDP. "Diesel" oil has more ZDDP than conventional oil. I cannot remembet the numbers off the top of my head , but IIRC the old stuff had 1500ppm, shell Rotella has 11 to 1200 and conventional oils had 5 or 6 hundred. I run A ZDDP adder on ALL of my old gas vehicle as well as rotella 15 40.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Harvestin Corn in Southern Wisconsin: The Early Years - by Pat Browning. In this area of Wisconsin, most crops are raised to support livestock production or dairy herds in various forms. Corn products were harvested for grain, and for ensilage (we always just called it 'silage'). Silo Filling Time On dairy farms back in the 30's and into the first half of the 40's, making of corn silage was done with horses pulling a corn binder producing tied bundles of fresh, sweet-smelling corn plants, nice green leaves with ear; the
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
