Among the things which could bring about excessive oil consumption is apex seal failure which will cause increased clearance between the rotor and housing. This allows interior oil leakage in the combustion chamber leading to grey smoke from your exhaust. The Mazda RX-7 can be a legendary car or truck https://httpsjdmengineforsalecomp44227.blogunteer.com/36771294/an-unbiased-view-of-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale