Don 656, in order to see whether or not 89 octane has at least an R rating of 93 we have to know the M rating. My reading indicates that the US version has at least 82 octane, thus if my calculations are correct 89 octane gas by the average of R+M has an R rating of 96. The M value can be as high as 85 and still have an R value of 93. If M is as low as 80, the R value is then 98. In other words with an average octane of 89, as the M value increased, the R value decreases, and vice versa. The ONLY way to be absolutely sure is to see if your distributer can find out what the M value, or better what the R value is. But, IMO, there is no way that 89 octane based on the (R+M)/2 octane is NOT going to be suitable for IH 6 cylinders. Many say that 87 is ok, but I can see that depending on the condition of the engine it may be borderline. I will also say the the only 6 cylinder I have driven is a 460, the manual says it needs 80 by the motor method or 87 by the research method. I will agree with Tractor Vet that it depends on how heavily the engine has been modified, or how carboned up it is, but that is as far as the agreement goes. Also if it does not detonate it is ok. My ears are too far gone to hear that anymore. Without further data or absolute proof, which no one including me and Tractor Vet actually have, you simply have to decide for yourself. I have entered into this discussion, because all my life I have been told and have read that low compression engines do not need high octane gas. Tractor Vets comments are the exact opposite of that, and I simply do not agree.
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 - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
... [Read Article]
Latest Ad:
1965 International Harvester McCormick Farmall cub tractor 2,500. Two owner tractor. My grandfather bought new in 1966, then we inherited it. Have all the paperwork original manual and all maintenance records. It starts and moves. Comes with underbelly mower, plough, and some other attachments.
[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.
