Thanks for your post....it was helpful. By the way, I plan on using fully synthetic after the cat/con is gone. I almost had the cat/con out last night, but ran out of daylight. To remove it, the back portion of the exhaust has to be removed, in order to reach the last 2, of 6, bolts . I got a good deal on the Waverunner, now I know why. Oh well, it should run well after the fix.