Viking Sports Club went joint top with Masons Arms in Section 1 of the Morrells League after crushing struggling South Oxford Club A 5-0.
Ernie Smith set them on their way by winning the opener 4,060-1,860 against Jim Patey.
Roy Clough (4,980-4,140), Tony Smith (7,530-4,530), Alan Oliver (6,890-1,360) and Ian Moss, who sunk the last ball in the 200 pocket to beat an unlucky Dave Bartlett 4,590-4,490, completed the white- wash.
Black Boy edged out visitors Masons 3-2 with Dave Jarman (2,670-1,890), Kevin Pringle (8,910-2,320) and Bob Pincombe (5,400-3,860), who has now won twice as many games as last season, on target.
Masons' points came from Dave Rose (3,710-1,910) and Bob Allsworth (3,840-1,230).
Three teams share top spot in the Premier Section on 11 points.
Royal Standard produced the week's best performance by winning 4-1 at Democrats B.
Billy Hill beat the visitors' Pete Ewins 5,760-4,980 in the first game.
But then the Standard took the next four through Dave Butt (2,430-1,710), Terry Coleman (8,860-2,930), Anthony Hayes (6,430-2,400) and Alan Lacey (12,330, break 10,120).
Section 2 leaders Prince of Wales ran out 4-1 winners at home to Bricklayers Arms.
Terry Green (3,490), Richard Garrett (7,090), and Dave Davies (4,310) put the hosts 3-0 up.
Steve Trinder (3,570) pulled a game back, but unbeaten Jason Cattermole wrapped up a brilliant evening by scoring a faultless 10,620 (break 8,090).
A point behind are Watermans B, who pulled off a tremendous win 4-1 at Masons B.
Alan Seaman (2,530), Tony Williams (3,030), Phil Chaundy (3,470) and Paul Simmons (4,000) his fourth win in a row completed a fine victory.
**RESULTS
Premier/Section 1: Vikings 5, South Oxford SC A 0; Black Boy 3, Masons A 2; Democrats B 1, Royal Standard 4.
Sections 2/3: Prince of Wales 4, Bricklayers 1; Masons B 1, Watermans B 4; Bullnose 2, Shelley 3.
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