Re: synthetic vs.tcw3
I go to wal mart and buy what ever I find at the best price that is rated tcw3, I pre mix my oil due to having problems with oil pumps in the past , live and learn. I do use 20 oz for 5 gal to 5.5 gal, and have not had a problem even with the 800 engine that uses raves and counter balance shaft and rotary valves. I was told by other people that you must use sea doo oil I never use it. I go through a lot of oil and I beat the stuffing out of my jet skis, I also monitor the compression and tops of the pistons every few weeks, Just as a matter of routine, The number one cause of engine failure is water ingestion, a small amount of water in the hull can become a serious problem if it gets thrown in the air by the flywheel or driveshaft,it ultimately ends up in the air and is drawn in by the air intake, this washes the oil off the rings and causes some of the aluminum to detach from the piston top and stick the rings. That is the item to be more concerned with, I constantly remove my seat and check for water in the hull when I ride my skis, Most sea doo skies use a carbon driveshaft seal this is in my opinion a very bad design, I remove them and install the carrier seal as it is a better way to keep water out, however it does require a little grease from time to time, or it can sink your ski in a hurry if it gets siezed on the shaft, But the carbon seal will sink you as well if it breaks and they do that all the time. I just towed in a gti with a broken seal last saturday, the hull was nearly full of water and the engine sucked down a lot of salt water because the owner did not realize he was sinking. As far as oil I was told by one dealer that mercury oil was the best , then a marine store warned me not to use it because it had a lot of amonia to keep down the ash and regular tcw3 was the way to go. The store owner who told me this sells both oils and gets more money for the mercury oil, I own a mercury out board on my fishing boat, so I started using plain old tcw3 with no problems and now I use it in my skies with no problems. but It really depends on your preference not mine, after all its your ski. I had a jet boat and used tcw3 in that as well never had a problem, ran with and without the oil injection worked both ways. Being from the days when we used to mix 1 quart of non detergent motor oil in our gas for out board engines, I just have a hard time adding vegtable oil to my fuel lol. I have seen what that stuff does in the fuel tank after a year of sitting, it looked like kayro syrup,mixed with tar. I had to use acid to get it out of the fuel tank.
