Most of the damage was done in a devastating 13-minute spell either side of half-time where Al-Ain scored four times.
During that blitz a brace from Mohammed Ahmed (43 & 56 minutes) sandwiched two goals from Omar Abdulrahman (45 & 53), before Al-Ain added further strikes through leading scorer Asamoah Gyan (65) and Jires Ekoko (79).
Al-Ain are now two points clear at the summit after nearest rivals Al Wahda slumped to a 4-1 defeat to Al-Nasr, who leap-frogged above their opponents into the top two following a hat-trick from Bruno Correa.
The Brazilian netted in the seventh, 62nd and 67th minutes to put Al-Nasr in charge before Humaid Abbas (89) added a fourth after Al Wahda had pulled a goal back through Tawfiq Raziq.
A last-minute effort from Alex earned Dibba Al Fujairah a 2-1 comeback home win over Al-Wasl. The visitors took an eighth-minute lead through Emiliano Alfaro but Fernando drew Dibba Al Fujairah level soon after before Alex's late winner.
In Sunday's other game Al-Dhafra drew 1-1 at home with Dubai SC, the hosts taking a 50th-minute lead through Fawzi Bashir only to be pegged back by a late leveller from Malallah Ahmed.