A 1-1 draw at West Kirby on Saturday ensured Castrol Social removed any lingering fears of finishing in the bottom two places in Division One.
A Paul Smith goal secured their point and ensured that they finish above neighbours Ellesmere Port, while Tommy Baker netted for their hosts.
However, the Oilmen slipped to a 5-2 defeat at Cammell Laird on Monday evening in their final fixture of the campaign.
Vauxhall Reserves also completed the season on a losing note as they went down 2-1 at home to Ashville at Rivacre Park on Monday.
Capenhurst Villa, who have finished next-to-bottom in Division Two, will be hoping to end an unhappy season on a high note on Saturday as they tackle Wirral FA Amateur Cup winners Heswall Reserves in the West Cheshire Bowl final at Cammell Laird (3pm).
Villa's second string ended the season with a 2-0 home defeat against West Kirby Reserves as efforts from Owen Davies and Mike McGree steered the visitors to victory.
Meanwhile, there was controversy at the Cheshire Amateur Cup final played at Vauxhall FC's Rivacre Park ground on Friday as Poulton Victoria clashed with Barnton of the Mid-Cheshire League.
The game ended in a 1-1 draw as Steve Davies opened Barnton's account only for Gary Reay to equalise.
Extra time failed to produce any further goals, although Vics missed a penalty.
During the subsequent shoot-out, which Barnton won 4-3, Vics were left furious after the referee allowed a Barnton spot kick to stand, after the ball had struck the post and gone into the net via goalkeeper Skupski.
The laws of the game state that in a shoot-out, once the ball has struck the post, it is deemed 'dead' and the goal should not have stood.
Poulton Victoria are now considering a formal protest.