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Josh Hoffman

02-26-2005 06:02:13

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I have several old tractors (2 of which are early 40's WC's), nothing is older than 1949. I am starting to get them ready for spring. Normally I put fresh 30W oil in them (I happen to buy the Nappa brand)/ I've been doing this for many years. Anyway, a local man tells me I am actually harming my tractors, that I should be running a non-detergent 30W. Is he right? Does it make any difference? I do pull with them in the fall @ local fairs. Thanks from Maine.

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Texas Denny

02-27-2005 06:39:36

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 Re: oil?? in reply to Josh Hoffman, 02-26-2005 06:02:13  
I agree totally with Steve. If you've used detergent for a while with no problem, continue that plan. On my older engines, I use 20W50 as it is lower viscosity at starting than thirty weight which permits better cold lubrication. At operating temperatures, it is higher viscosity which provides better running temperature protection than 30W. On engines in good condition, I like 10W40 for the same reasons. I just started a C Allis after rebuild and used 5W20 for the first oil change. After 2 hours, I drained the oil and pulled the pan. The oil was ugly looking and I had to wash the pan with gasoline after only 2 hours of running. Everyone has their little tricks. My suggestion is to match the oil to the tractor, but always use detergent.

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02-26-2005 14:49:32

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 Re: oil?? in reply to Josh Hoffman, 02-26-2005 06:02:13  
i assume you mean you have been usnig a detergent oil for many years and your buddy says the original spec was non detergent. you are both talking about 30 wt motor oil? if that is the cas, continue to use the detergent motor oil. originally the tractor had non detergent. the theory is that after 50 years there may be sludge in the motor and starting up with detergent will break it loose and float around in the motor and plug somthing. if you have already started using the detergent and the motor is now cleaned out and you have been using for a couple years, continue to use it. the detergent is actually a better oil. I dont know where you live. but if you used the tractor at 20-30 degrees, you might want to use 10W30 to help the cranking in the winter.

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