This is so far the best oil I have used in myself exmark 72" efi Kohler ecv980 35hp. The engine never clacks on startup due to hydraulic lifters having to pump up, it hasn't used a drop of oil in 54 hours and the engines just seems to run so damn smooth! I have ran several different types of oil in this engine...... it likes that k-tech oil with zinc additive the best
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