Among the list of things which could trigger extreme oil intake is apex seal failure which brings about increased clearance amongst the rotor and housing. This enables interior oil leakage into the combustion chamber resulting in grey smoke from your exhaust. Or main issues for instance apex seal or turbocharger https://charliegkebz.blogthisbiz.com/45201369/what-does-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale-mean