Above you can see a number of popular kart racing.  Look carefully and you can see that
they do not mix.

My Recommendations:
Do not take a chance on mixing any brand of oil with another.
Do not use assembly lube.
Assemble engine with the oil you are going to use to break it in with and race with.
Do not break in engine on conventional motor oil and then switch to a "Kart Racing oil"
There are probably other scenarios that i haven't thought of.
There are probably other scenario's that i haven't thought of.
There are probably other scenario's that i haven't thought of.

All it takes is a few seconds with out lubrication to start  welding (metal transfer) from the
rod to the crank pin. Once aluminum rod material starts to build up on the crank pin it's all
over.


These simple test were done at 65* F. Who knows what will happen when you heat any of
these concoctions up and stir it up violently in the engine.

Don't be fooled by oils smell like Po puree
Here's one brand of oil on a piece of clear lexan with another brand of oil
on top of it. Notice that it creates it's own separate pool.  There is a
boundary between the two pools. If the two oils are compatible they will mix
completely.
If you are going to switch from one
brand of oil to another (to be safe)
you must completely flush the engine
with a solvent that will cut (clean) the
original oil.
I am not promoting or degrading any brand of
oil. I'm simply showing some simple test results
i got when mixing oil brands
Oil Testing
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