Oil was discovered couple of hundred years ago,but long before that Muslims reigned in Spain for 800 years,spread Islam through other parts of Europe,Russia,Central Asia and China,Far East not to speak of India.
In India,Islam spread by zealous missionary works of Saints (Aulaya ) like Hazrat Data Ganj Bakh Ali Hijwari(RA),Hazrat Nizam-udin Aulaya (RA),Hazrat Moeen -ud -din Chisti, Gharib Nawaz( RA )to name just a few and numerous others throughout the World.
Islam is based on solid footing,which will never be shaken.Its not based on superstition,trickery,folklore,irrational theologies and concepts.
Its based on direct,one to one relationship with God,rationality,purity of thought and action and kind,considerate,equal,fair relationship with others.
Thats how Islam spread, not because of oil engines. Its like saying Christianity is going to spread in India because of import of nuclear energy from USA.
