It will tell if the oil meets your engine specifications, found in the owners manual.
Very important for late model engines with emissions and high tech variable valve timing, or GDI (gas direct injection).
Old tractors will do just fine on diesel oil or gas oil as long as the viscosity is close. Multigrade is good, but keep the numbers high, no 0, or 5, stay with 10w 40 or 15w 40.
Oreillys doesn't make the oil, they buy it packaged for them. Who knows what the maker actually is, but you can trust it is what it says it is, they would be subject to mega lawsuits for selling something that falls short!
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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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