The RX-7 list is all folks who are dripping crankcase oil into the intake are they not?  They aren't pre mixing oil with their gas are they?  The lubricating system is a "closed" system.  Injecting oil into the intake constitutes a small oil leak OUT of that "closed" system.  Pre mix oil blowing past the seals into the crankcase would constitute a small oil leak INTO the system would it not?

Just a theory ... Jim S.


Russell Duffy wrote:

Just curious, is this increasing oil level we find using pre-mix only happening because we run such high power all the time?  I just spent a dizzying few minutes searching the RX-7 list for any mention of this phenomenon, and couldn't find one.  Neither of my previous RX-7's (85 and 93) ever showed any sign of increasing oil level.  The 85 injected oil at the carb, so it would be similar to pre-mix.  The 93 was oil injected, but I also added 4 oz MMO per tank, so there was some pre-mix.  

 

Rusty (finally off to see if our latest part actually works)