Keep us updated - be good to know what went wrong.
The Car in question was driving fine with no symptoms at all, then started to misfire really badly till is was almost undrivable, but no smoke and an engine warning light on the dash.
The owner contacted a Mazda garage that told him the handbook said it was ok to limp home.
10miles into a 15 mile journey home the car started to produce masses of oil smoke and and eventually just stoped.
On testing the engine we found almost no compression on the front rotor.
We fitted a 07 engine and the coil packs that came with the new engine to the car.
When fired up with the new engine the car had an engine warning light on, the car drove fantastic with no symptoms at all.
on further investigation on the engine warning light it turned out to be the front coil packs but the car felt fantastic to drive.
We took the old front coil packs off the old engine and fitted them to the new engine and it produced a massive misfire and the same engine warning light.
We swapped them for the old rear coil packs and the engine warning light disappeared.
The failed coil packs probably caused the engine failure.
Moral of the story ?
If you get an engine warning light sort it mediately.
If you get a missfire dont do what mazda says and drive it home, stop and get it recovered.
What reminded me to update this post is i have another RX8 with the very same symptoms of engine failure and also one that is just starting to produce a slight missfire and a occasional engine warning light.
So in the space of 2 months iv gotten 3 RX8 with similar symptoms.