For my next question,
what weight of oil are you using? I'm using Mobil 1 SuperSyn, and have
only used 15W-50 so far. I don't know about the RX-8, but I know that
almost every vehicle on the planet uses 5W-30 now. I bought some
5W-30 the other day, but still haven't decided if I'll use it, or swap it for
one of the other weights.
My thinking when picking
up the 5W-30 was to limit the resistance through the cooler, and filter.
I also understand that lower viscosity oil will probably provide better
cooling, due to higher flow, and perhaps better heat transfer. It
would also limit the initial pressures that will be seen on a cold
startup. Bruce did mention that he thinks Tracy prefers the higher
weight oils for the benefit of the redrive, since it's using engine oil,
rather than the proper gear lube. Of course, these are auto transmission
gears, which don't use heavy lube
anyway.
SuperSyn comes in 5W-30,
10W-30, and 15W-50, so which would be
best?