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Jazak, do the R4s you have use the same rims as the turfs? Did it come from the dealer with the R4s, or did you change to them?

Ag Tires for 790
John Deere Tractors
Replies 21 Post by TJ

Just got back from a business trip and saw that the oil thing is still going on. Wow, I had no idea people had such strong feelings about oil. I posted a message some time ago that approached the subject from the engine design point of view. Design is my bailiwick so I'll stick to that and tell you all right now I'm no expert on oil per se...thats a whole other career. I work for a manufacturer of large commercial equipment and I deal with technical issues regarding the care and feeding of same from customers worldwide. You all talk about your 30K spent on a tractor. Well its the same from a commercial operator who spends millions on their equip. Believe it when I say if it don't work, I hear about it. From the design perspective I can tell you this, the engines in your tractor/truck/car/etc. were designed to operate using the motor oil prescribed in the manual under a wide variety of operating conditions. And like anything else if you take one aspect of a complex mechanical system like an engine, in this case oil, you can go as deep as you want, i.e. micron filtration, SEM analysis, ppm water content...and on, and on, and on. It's all good data and I suppose it even says something to the lay person who wants to see something. You could do the same thing with metalurgy or bearings or combustion or fuel delivery, ad extremum. But, if you have an engine that was designed properly, manufactured properly, and assembled properly it will provide you with years of reliable, trouble free use for as long as you want to use it, by doing nothing more than using the oil specified by the manufacturer and changing it at the prescribed intervals. Now, of course an engine will eventually wear out with use, but it will also wear out in ways not related to the lubrication system and in time will still need overhaul or replacement. Believe me folks, equipment takes a beating out there. It has to work hard in conditions that would make some of you stand up and stare, and do it with very little maintenance because some owners just don't go there. However, if you are a company in the business of making cars or trucks or tractors or airplanes or engines or whatever, and you want your equipment to hold up out there in the real world, you got to design, manufacture and prescibe maintence schedules to the lowest common denominator. If you build engines that only hold up under ideal conditions and pampered usage, well you better get yourself into another line of business 'cause aint nobody going to buy your stuff. In summary, if an engine craps out before its time under proper maintenace and normal usage, it's the engine my friends and no amount of praying to the oil gods is gonna save it.

Synthetic Oil vs Petroleum and Filter Quality
Parts and Repair
Replies 91 Post by tj