leon 93 rx7

hi, as im new to rotary im not to sure about servicing! does anyone have any recomendations of what should be done and when, to prolong the life of the engine. ive been told that the oil must be changed every 3000miles by a non-synthetic oil. does anyone know what ratio this oil should be? my car is a jap import so im not sure when it was last serviced. i will be gratefull for any help. thanks leon.

Mahjik

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