Can I mix SeeDoo oil and Amsoil

[bigJake]

I just bought a '97 GSX, the previous owner said he used See Doo oil, the low oil light came (looked like the oil tank was still almost half full) but I got Amsoil at the local Marina and poured in less than a quart and ran the jetski for about an hour - it ran fine Then I read all the posts here about never mixing oils and am concerned. I talked to a service tech at a local SeeDoo dealer who said not to worry about it, mixing that small amount of oil would not hurt anything. In fact he said if I just let the SeeDoo oil in there now get down to about 2 inches full I can just fill it the rest of the way with Amsoil and continue to use Amsoil. This advice seems to contradict with what I'm reading on this forum about never mixing oils. Can someone who really knows please advise if I'm ok or what should I do? Thanks!

 

[nswillin]

Straight out of the Seadoo Manual.
CAUTION: Never use 4-stroke petroleum
or synthetic motor oil and never
mix these with outboard motor
oil. Do not use NMMA TC-W, TC-W2
or TC-W3 outboard motor oils or
other ashless type 2-stroke oil. Avoid
mixing different brands of API TC oil
as resulting chemical reaction may
cause severe engine damage.


So.....why risk it. Drain all oil out. Replace with new, purge the lines, bleed air out, roll on. :cheers:

 

[bigJake]

how do I drain the oil?

OK, figured I'd take the advice and not risk running with the mixed oils but I went out to drain the oil and didn't know where to begin. There appears to be 2 hoses coming from the oil resovoir (1 with what I'm assuming is a filter the other without) they both disappear under the engine so I didnt know how to gain easy access to remove the hoses to drain the oil or if there is an easier way? Sorry, I am a novice, can someone walk me through this?

 

[Nate Surveyor]

I can sort of help, but others would do you better.

Fact: You have an out and an in line to that tank, that attach to the bottom of the motor. This lubes the rotary induction system.
Then, you have a line that goes to the filter, and then on to the pump. This one feeds oil to the motor.
Then, you have a vent. I think it will be without a tube on it.

When all it working correctly, the oil circulates through the rotary induction system, and back to the oil tank. This circulates the oil, and MIXES whatever you have in the tank!

And, the tank feeds the motor.

So, what you are going to need is probably access to the oil lines on the bottom of the motor, and hook on another tube, and somehow drain this system. I think of running a line out the back of the boat, through a drain plug, and tilting it back, and letting it all drain.

So, I think of 2 solutions:

1.) Best case scene, where these 2 oils get along pretty good, and all you do is drain the tank, and the little left over in the lines is harmless.

2.) Worst case, the 2 oils don't get along good, and you really have to purge the whole system.

Say, don't you think it was easier to not mix & change oils?

Sounds like work!

It is always better safe than sorry. So, I say at leas drain the tank. Even if folks say it won't hurt.

N