Colin Allen took 8-28 as Long Marston 2nd were rolled over for just 82 by Wallingford.
Earlier the home side had been bowled out for 177 after being put into bat, Warren Ainsworth top scoring with 51, while Martin Keable took 5-48.
Wallingford 25, L Marston 2nd 5.
Stanton St John, playing their first match since the death of club stalwart and league president Derek Primett, escaped with a draw against Thame 2nd.
A quickfire 51 by Richard Carr lifted Thame to 203-7, and then Carr took 7-68 to have Willows in trouble.
But Pete Dela (46) and Ashley Pike (42) dug in and the hosts closed on 144-9.
Stanton SJW 8, Thame 2nd 16.
John Finch took 5-31 and Nathan Absalom 4-51 for Oxford 3rd, who bowled out Bledlow Village 2nd for 152.
Oxford then reached 153-3, Mark Sheehan top-scoring with 52.
Oxford 3rd 25, Bled Village 2nd 7.
Bourton Vale 2nd racked up 264-4 against Bledlow Ridge 2nd, thanks to 83 from Mark Arthurs.
In reply, Ridge scored 239-6, Henry Hale top-scoring with 92.
The start of the game had been delayed after umpire Peter Walker was taken ill.
Bledlow R 2nd 14, Bourton V 2nd 14.
Rob Ford's 74 not out helped Wolverton 2nd to 183 all out against Horspath 2nd, who then eased to 184-4.
Wolverton 2nd 7, Horspath 2nd 25.
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