Posted by John T on October 29, 2007 at 07:45:27 from (66.244.83.147):
In Reply to: 93 octane? posted by ggg7lazy77 on October 28, 2007 at 22:48:44:
Higher octane gas is refined purposely to be harder to ignite to reduce pre ignition spark knock in higher compression engines. In low compression engines (like old tractors) Theres no need or sense in using any higher octane then necessary cuz it may even leave more unburned n potentially harmful fouling deposits then the easier to ignite regular 87 octane.
As far a valve life, the lead in the old leaded gasoline helped reduce valve face n seat recession as it provided some degree of lubrication and cushioning of all the constant valve face to seat impacts, however, hardned seats has helped reduce that problem.
DONT RUN ANY HIGHER OCTANE THEN NECESSARY to stop pre ignition spark knock and unless an old tractor has had its compression raised significantly 87 should be fine.
Fer as I know its the lead or lack thereof (or substitutes) instead of the octane thats a valve saver.
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 - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
... [Read Article]
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.
