Trevor Spindler took 7-16 from 11.2 overs to bowl Wallingford to victory at Bledlow Vilage 2nd and keep his side on course for promotion in Division 6.
The table-toppers had been in trouble earlier in the day after Chris Spooner took 7-41 to help bowl them out for just 116.
But Spindler then teamed up with Ali Damirchi (3-26) to bundle Bledlow out for 54.
Bledlow Village 2nd 5pts,Wallingford 25
On a day of generally low scores, Julian Lawton-Smith's unbeaten 85 stood out in Oxford 3rd's eight-wicket success at home to Wolverton Town 2nd.
Town could manage only 139 all out as Sean Oliver took 6-53 and Waqas Ali (4-32) continued his good form.
Lawton-Smith and Chris Jones (35no) then took Oxford to victory with few alarms.
Oxford 3rd 25, Wolverton Town 2nd 4
Bourton Vale 2nd's batsmen all struggled at Thame Town 2nd, where Ian McStay took 3-39 and Chris Brougham 3-8 as Vale were dismissed for 105.
Tom Collis then hit 28 - the highest individual score of the match - as Thame scrambled their way to 106-7, despite Roland Seddon's 3-13.
Thame Town 2nd 25, Bourton Vale 2nd 8
Chris Gray hit a classy 73 in difficult conditions and with the support of Matt O'Connor (47) enabled Horspath 2nd to declare on 221-9 after 50 overs at Stanton St John Willows.
Pete Dela was the pick of the Willows attack, taking 3-37 off 15 overs.
Sharaz Rana then took 3-30 in an opening burst, before Dave Heritage (4-29) and Tom Smith (3-25) finished the visitors off despite Ashley Pike's 52.
Willows were deducted five points for failing to provide an umpire.
Horspath 2nd 25, Stanton St John Willows 1
Adam Vessey hit 54 as Long Marston 2nd scored 239-8 from their 52 overs at home to Bledlow Ridge 2nd.
James Stevens then hit a fine 93 and Richard Dryden 38 not out as Ridge came up just short on 222-6.
Long Marston 2nd 14, Bledlow Ridge 2nd 11
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