Paul I have followed you for many years and I ran into the above car
last week and bought it. Please tell me what 2 cycle oil to mix with
the gas and what to do to keep it running.

Peter  Duffecy

You lucky dog. Most that age have over 300,000 miles.

Use Walmart 2 cycle oil offered in gallon cans.

It has an injection pump so you don't need to mix oil with the fuel
IF the nylon lines are still OK.  A BIG IF. At that age they are
brittle and could crack at any moment. I would replace them with
steel brake line but that might take a lathe.

These cheap plastic lines are critical to the life of the apex
seals, and engine for that matter, if you are not mixing 2 cycle oil
with the fuel.

Paul Lamar

Should I assume that the lines are bad and mix oil till I can be
sure. How can you check these and I do have a lathe available to me.
 Peter Duffecy

Yes by all means that is the safest way to do it.

However they could be cracked and there could be some engine damage.
 The engine may still run. It is a good idea to check the oil lines
and the compression.

Nylon oil line failure is the main cause of Rotary engine failure.
If it gets apex seal oil it will last at least to 300,000 miles and
probably a lot more.

The apex seal wears very roughly  at the rate of .001" per hundred
hours at full throttle. The seals probably can tolerate .030" total
wear. That would be 3000 hours. If you put Iannetti silicon nitride
seals in it you are looking at 20,000 hours :-)

Paul Lamar

Paul

by chance is there any data or estimates on the wear when using
Iannetti SiN seals. I assume they are much more tolerant to
conditions of reduced (or zero) apex oil feed. With the SiN seals,
most of the wear will probably be on the housing liner rather than
on the seals themselves

Regards Simon S

Other than the 20,000 hour estimate I have no data.
A line in the  housing is  only in contact with the seal for a short time so
most of the wear would be on the seal. The Mazda housing liner is hardened
steel chrome plated and will last a long time if you keep the grit
out of it.

Did you get any money yet to build and test a  TC rotary :-)
I'll loan you my TC 3 rotor. No problem loading it
into my new stealth motor home.

Paul Lamar

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