Among the list of things which could lead to abnormal oil consumption is apex seal failure which causes increased clearance involving the rotor and housing. This permits inner oil leakage in the combustion chamber causing gray smoke from your exhaust. Or important issues such as apex seal or turbocharger failure. https://httpsjdmengineforsalecomp12097.blogtov.com/18485151/how-much-you-need-to-expect-you-ll-pay-for-a-good-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale