Posted by JMOR on October 01, 2023 at 12:51:12 from (76.187.196.138):
In Reply to: Shell Rotella? posted by Geo-TH,In on October 01, 2023 at 03:54:01:
Quote: CVPost-Geo-TH,In (quoted from post at 14:08:42 10/01/23) Richard,
Remember King Richard?
He drove the #43 STP race car.
Fact check; Is Zinc one of the active ingredients in STP? IF not what is the active ingredient?
If So, we call STP snake oil.
If Shell adds zinc to their oil, they can Call it Rotella.
Isn't chemistry neat?
A half lifetime ago when I overhauled engines, I would coat all parts with STP when I was assembling the engine. Never had an engine lock up.
DuckDuckGO the term ZDDP (zinc dialkyldithiophosphate) . It has been used in motor oils since ~1940's and GM once offered an additive package containing ZDDP. After cat converters, the levels were reduced, but still present, as far as I can tell, with more in diesel than oil for gas engines.
Sometime the limit of 800PPM was set (probably cat converter), but prior to that 1400PPM could be found in oil for diesel (CI) engines. I had a can of un-opened oil from the 1960's and a lab analysis showed only 517PPM. It has designation (now obsolete I think) of MM-MS-DG .
I can report it had MM-MS-DG stamped on the top of the can, which means, in the current API system it would have met SC standards of 1964 or their upgraded 1968 standards for SD (both called MS back then), and DG means a CA for diesel use. The use of the word "plus on the label might have signaled the higher level that became "SD".
This post was edited by JMOR on 10/01/2023 at 01:02 pm.
Upload one or more videos to your post. Photo and video filesizes should be less than 8MB. 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 - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
