I suppose after 30000miles i experience some turbo leakages in my CX-7.
I will try a little thicker synthetic oil. I believe 5-30w oils with Kinematic Viscosity @ 100C, cSt around 11-13 will do the work. DEXELIA has 9.8 and a good synthetic 5w-40 has around 13-14.
Now, the new kit from mazda...