CASTROL were knocked off the top of Division Three after suffering only their second defeat of the season at Alderley Park on Saturday.
The Oilmen had started brightly but a middle-order batting collapse gave the hosts the impetus to go on and secure a two-wicket victory.
Captain Mark Evans lamented his side's defeat and felt they were worthy of a draw.
He said: 'I really thought we were in with a shout, but fair play to their skipper, he batted well and got his side past the winning post.
'We probably didn't deserve anything for our batting display, but after the way we bowled and fielded I think a draw would have been the correct result.'
Castrol were first to bat and lost Tony King (0) early after a fine delivery from Butterworth.
Paul Benbow (15) was next to fall before skipper Evans' (0) brief batting display left the Oilmen on 36-3.
Martin Flanagan (65) got Castrol back on track with an outstanding individual batting display including a mesmerising 12 fours.
But when he was controversially called out after a hopeful appeal from Butterworth (6-39), the visitors suffered another rapid loss of wickets to leave them 150ao.
In reply, Alderley Park started slowly and the Castrol bowlers were forced to be patient as they looked to keep their hosts down to a low score.
Nishan Bandary (3-55) and Flanagan (2-22) were bowling well and swept through the middle order to give Castrol a fighting chance.
However, Alderley Park's captain and opener Alleyn Plowright (68no) were in magnificent form and almost single-handedly dragged his side past the target of 151 with two wickets to spare.
Alderley Park scored 23 points, Castrol seven. nCastrol's next match is at home to Northwich on Saturday.