Posted by Charlieu on February 02, 2015 at 17:45:42 from (206.8.2.191):
What's with these numbers? 5W30 - 10W30 - 15W40 As I read all the post about different weights of engine oil. How many people know what these numbers stand for. These are Multi-grade oils. The temperature range the oil is exposed to in most engines can be wide, ranging from cold temps in the winter before the engine is started up, to hot operating temps when the engine is fully warmed up in hot summer weather. A specific oil will have high viscosity when cold and a lower viscosity at the engines operating temperature. The difference in viscosities for most single grade oil is too large between these extreames of temperature. To bring the difference in viscosities closer together, special polymer additives called viscosity index improvers are added to the oils. These additives are used to make the oil a multi-grade engine oil. The idea is to cause the multi-grade oil to have the viscosity of the base grade when cold and the viscosity of the second grade when hot. This enables one type of oil to be used all year. In fact, when multi-grades were initially developed, they were frequently described as all-season oils.
The SAE designation for multi-grade oils includes two viscosity grades: for example, 10W30 designates a commom multi-grade oil. The first number "10" is the viscosity of the oil when at cold temperatures "zero (0) degrees" and the second number is the viscosity at 212 degrees. So it's like this "A 15W40 pours like a 15 oil when cold and lubricates like a 40 oil when hot". Thanks to viscosity index improvers.
I hope this helps some of the oil confusion, Sorry, this got a little long, but it just had to be explained.
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 - History of the Cockshutt Tractor - by Danny Bowes (Dsl). The son of a very successful Toronto and Brantford, Ontario merchant, and himself quite an entreprenuer, James G. Cockshutt opened a business called the Brantford Plow Works in 1877. In 1882, the business was incorporated to become the Cockshutt Plow Company. Along with quality built equipment, expedious demand and expansion made Cockshutt Plow Works the leader in the tillage tools sector of the farm equipment industry by the 1920's.
... [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.
