The many abovementioned challenges, Primarily too much oil intake, may lead to turbo failure while in the Mazda RX-7 FD. The turbochargers need to have a constant offer of oil to keep them lubricated and cooled, and if you'll find oil difficulties, the internals will overheat due to extra friction. https://edwinlkdvn.tribunablog.com/about-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale-48181430