Jimmy Gopperth reduced arrears with a try, only for Jonathan Joseph to extend the lead again.
Dan Bowden helped himself to two tries before Ojo completed his hattrick, before Alex Tait scored a late consolation.
Bath got back to winning ways as England international Shontayne Hape grabbed his first try of the season in a 31-16 win over Sale.
Duncan Bell, Matt Carraro and Ben Williams also went over with England exile Olly Barkley converted all four and added a further penalty.
Sale could only manage the solitary try through Wame Lewaravu late on while Paul Williams adding 11 points with his boot.
A late Nicky Robinson helped Gloucester to a narrow 22-20 victory over Wasps, who had Dan Ward-Smith and Joe Simpson go over the whitewash - the latter on his first start of the season.
Elsewhere struggling Leeds were no match for champions Leicester who ran out easy 48-6 winners - scoring eight tries in the process.
And new-boys Exeter were easily brushed aside 40-13 by Harlequins - fly-half Nick Evans collecting a 20-point haul in the process.