Posted by David G on January 17, 2019 at 19:21:13 from (209.181.208.169):
I keep reading the posts about motor oil and zinc, so did some reading.
Here is my take.
Zinc and Phosphorus (ZDDP) was not present in motor oil before 1942.
ZDDP contributes to ash in combustion chambers, valve trains and emission controls, so you can have too much.
ZDDP was reduced lately to reduce the coating affects in catalytic converters.
The oil I use (Delvac) contains 1012 PPM of ZDDP, it looks like break in oil contains up to 2200 PPM, so quite a bit more. It looks like the jury is out on how much zinc is needed for a tappet engine. The heavier the valve springs and steeper the rise on the cam creates more stress on the cam/tappet surface. It also looks like the issue is not when the engine is running, but mostly during startup where the zinc is left after the oil runs away.
Based on this information, I am "believing" the oil is safe for me to use in my antique equipment, because of lower spring pressure and cam rise.
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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 - Diagnosing Engine Difficulty - Diesel Tractors - by Staff. The following suggestions are listed for your assistance. You can make simple adjustments on your tractor that will improve its operation and save you the time and expense of hiring someone to do it for you. Always make one adjustment at a time, and if the adjustment made does not improve the condition, return to the original setting before proceeding to the next adjustment. Hard Starting Cold air temperatures. Insufficient fuel.
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[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.