Mazda rotaries, specifically the Renesis which was unveiled with the RX8 in 2004, are known for their high failure rates.
The failures are thought to result from 2 competing issues.
(1) Excess carbon generation, due to the motor oil injection into the combustion chamber. This carbon causes at least 2 apex seal failure conditions and perhaps one valve failure condition.
(2) Lack of lubrication in the combustion chamber due to lack of oil volume injected.
Solutions to this problem are
(1) add 2cycle oil to the fuel.
(2) effectively bypass using engine motor oil by installing external oil tank and supplying it with 2cycle oil.
The 2cycle oil theory comes from the fact it's made to be burned.
My questions are
(1) any reason(s) to not agree with these outright?
(2) what negative effects of the 2cycle oil injection should be taken into consideration? For example, catalytic converter damage comes to mind.
(3) what considerations should be made in selecting the 2cycle oil.
Any input would be greatly appreciated.
Thanks
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