I've been running either 0w40 or a 50/50 blend of mobil1 0w40 and 15w50 in my zuke for the last 15k. 5k indicated oil changes...so 7000ish actual. Blended the two because the 15w50 was super cheap but a little too thick.
I've liked the oil, and it has certainly cleaned out the sludge.
When I went to buy more, my local walmart has stopped carrying 0w oils...so no 0w40. The only close option was 5w30 pennzoil platinum.
I usually run something a little thicker in these motors because they run very high rpm and the thicker weights seem to quiet em down.
Put the 5w30 in expecting it to rattle a lot...and quite the opposite. The pennzoil certainly quieted it down.
I'll switch back to a 10w40 after the winter only in pennzoil... we'll see if it works even better.
I'm not one to shout say an oil brand quiets a motor, but it is noticeable enough for my wife to comment without knowing anything different.
I've liked the oil, and it has certainly cleaned out the sludge.
When I went to buy more, my local walmart has stopped carrying 0w oils...so no 0w40. The only close option was 5w30 pennzoil platinum.
I usually run something a little thicker in these motors because they run very high rpm and the thicker weights seem to quiet em down.
Put the 5w30 in expecting it to rattle a lot...and quite the opposite. The pennzoil certainly quieted it down.
I'll switch back to a 10w40 after the winter only in pennzoil... we'll see if it works even better.
I'm not one to shout say an oil brand quiets a motor, but it is noticeable enough for my wife to comment without knowing anything different.