While I figure out the oil warmer mounting situation, I would also like to look at the coolant plumbing. The coolant system in the Mirage is pretty simple. There are two lines coming off the head. One goes to the throttle body to warm it up, and the other goes to the heater core to provide heat to the cabin. I can tee into either of these to run in parallel, or run the oil warmer in series with either of these items.
I'm not quite sure what I would like to do yet, but I am thinking that running it in series with the throttle body would be a good idea. It can go inline before the throttle and be fine. The throttle body uses much smaller hose than the heater core, but I really don't think that the oil warmer needs THAT much flow. Its sized for 5/8" heater hose which seems a bit overkill. If you look at the Honda oil warmer / cooler, it has a much smaller coolant hose size going to it. The other perk with using the throttle body hose is the proximity to the oil heater. They're literally right next to each other, so the hose runs would be short.
