The problem in the car is that the oil injection sends significant unburned
synthetic oil out the exhaust and it eventually clogs up the catalytic
converters. A very expensive thing for the dealer since they must certify
the emissions system for 100,000 miles.  The engine itself loves the stuff.
I have around 1200 hours in the plane on Mobile1.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com
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Thank you (and Rino) for providing the true answer to this.  In all the
threads I've read on the RX-7 list, you'd think someone would have mentioned
this, but if they have, I didn't see it.  This makes perfect sense now.
Many people change the exhaust, and dump the catalytic converters, so I
guess it doesn't matter to them.  For now, mine is completely stock, so I'll
steer clear of the synthetic until I have the time and money to start
modifying the car.

Thanks again,
Rusty