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Very interesting data. Thanks for posting it Jim! I will digest it for a while.... I'm like an accurate, reliable but really slow computer, after you hit 'enter' nothing happens for some time while it 'thinks'. :-D b.t.w. - The number after the rating indicates the type of engine the oil if...

S.A.E. 30 meets all current diesel engine manufacturers' requirements. Also, no diesel engine manufacturer tells you NOT to use S.A.E. 30. So why do they generally spec 15w-40 these days? ....For it's true - they do. I can think of two logical reasons: 1 - The K.I.S.S. principle... Keep It...

I agree with you Jim, multi-grade oils definitely have their place, particularly in places with cold winters to eliminate the need to change oil seasonally. Though personally, I would use a block or pan heater before I used a multi-grade oil. What is this API rating you have that shows a...

Make sure you're using the correct oil - OE/HDO 30 (SAE 30) per the LO manual.... Most if not all of the people who have posted up that they have oil coming out their slobber tube, are using 15w-40 which is made from a less robust base stock and breaks down quicker in these older engines that...