At operating temperature 10W30 has the same viscocity of 30W, when engine is cold (Winter) 10W30 has the viscosity of 10 weight which has much more viscosity than 30W at operating temp.
The only problem with using 10W30 is that under extreme conditions (conditions that won't be seen with these engines - extreme heat) multigrade oil can break down. The bigger the multiple from the W number (in this case 10) to the operating temp number (in this case 30) the miore suseptible they are to thermal break down (does not normally apply to synthetics). 10W30 has a multiple of 3 - its a fairly stable oil even. 5W30 has a multiple of 6 and won't stand up as well to high heat as 10W30 which in turn doesn't handle high heat as well as straight 30W.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
... [Read Article]
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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.
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