Simon Dickens took four wickets for four runs in 21 balls as Aston Rowant 2nd collapsed from 160-5 to 173 all out at Shipton-under-Wychwood 2nd in Division 4.
Dickens (5-36) intervened after Thad Cooper (50) and Matt Needham (41) had put Rowant in a strong position.
Justin Hemming (43) and Russell Hayes (40) then gave Shipton a flying start before Anthony Prior-Wandesforde (59no) completed the six-wicket win.
Shipton 2nd 25pts, A Rowant 2nd 7
A classy 116 by Tim Hardy and a cavalier 70 by Paddy Daniel saw leaders Oxford Downs 2nd post 262-5 at home to Kimble.
Sam Agace's 49 was the only highlight of the visitors' reply, as Matty Watts (4-42) and Richard Gauntlett (3-59) worked their way through and Kimble were all out for 197.
Oxford Downs 2nd 25, Kimble 6
Paul Maddock took 6-23 in 22.2 overs, while Arshad Latif took 4-40 in 16 as Banbury Twenty 2nd were skittled for 82 after being put in at Stokenchurch.
Latif then smashed 70 not out from 36 balls as they secured a nine-wicket win in only 10.3 overs.
Stokenchurch 25, Banbury XX 2nd 1
A dogged 57 by Ian Belcher and a composed 46 by Steve Slade helped Cumnor 2nd to 220 all out at home to Princes Risborough, Steve Greaves finishing with 5-57.
Andy Hitchcock's 57 kept the visitors on track, but Julian Easterbrook (4-59) helped restrict them to 197-7.
Cumnor 2nd 14, P Risborough 11
Aussie Shannon Tubb again shone in Great Brickhill's eight-wicket win at Cropredy.
First he took 6-32 as the hosts were rumbled for 143, of which Matt Dyer hit 53, and Wayne Hazel 36. Then Tubb hit 74 not out as Brickhill eased home to stay second.
Cropredy 4, Great Brickhill 25
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