well i have never heard of 20-50 oil for a diesel engine only castol 20-50 for gas engines and have been using 20-50 for about 50 years or more.. , nor 20-40. dont know what part of the world u are in to have 20-40 oil. the important thing is diesel uses a series 3 oil or used to . its pretty straight forward that in cold weather its a 20 wt and when warm acts like a 50 wt. as to why its called multi-grade. diesel oil was always 15-40 in the multigrade , but now a days with these synthetic oils its 0-40 or 5-40 but u need to read the label to make sure its Deisel compatible. and its almost impossible to find 15-40 around here last few years.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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