10w30 MS - Oil ?????

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Hi I just bought a restored Allis-Chalmers D17 IV GAS tractor that was made back in 1967. The operators manual calls for 10w30 engine oil. They do offer a description- "Your tractor engine should be provided with MS oil. Oil designated MS contains certain additives to increase film strengh, to be corrosion resistant, to carry contamination in suspension, and as pour point depreeants, etc." The working RPM of this engine is 1650 and it is a 226 cu. in. 4 cylinder w/56 pto hp. What would you guys recommend?
 
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I don't remember all the details, but MS stands for <b>Motor, Severe </b> [service] -- as opposed to ML (light service) and MM medium service.
 
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Nowadays its called ch/ci4 heavy duty oil. Delo oils Shell Rotella,Mobil 1300 will work.Some heavy duty oils are available in lesser ratings like Delo 100 etc. Someone with more knowledge will add the exact proper info.
 

Redwing

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Thanx for the info guy's. I think I will try one of the ch/ci4 oils first in a 10w30 or sae30.
 
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