Oaks-bound filly May's Dream made the most of an inside run to give trainer Darren Weir a Moonee Valley treble on Saturday.

Weir won with Siwa Lady and Signoff before May's Dream claimed the Pantry Packer Handicap (1523m) by three-quarters of a length.

May's Dream, a daughter of Melbourne Cup runner-up She's Archie, finished second in the Group One Thousand Guineas and Group Two Wakeful Stakes in the spring.

Weir said May's Dream would run in the Group Three Auraria Stakes at Morphettville on April 12 before the Group One Australasian Oaks at fortnight later.

Apprentice Harry Coffey, who also partnered Siwa Lady, steered May's Dream into a run on the inside horses at the turn.

May's Dream ($4) outsprinted the $3.30 favourite Double Dee in the straight while Hazard ($4.60) was third.

"It was just nice to see her get a soft run behind the leaders and gallop home over the last 300 metres when the gap came," Weir said.

"She should train on well from that."

Earlier, Brad Rawiller had little use for his whip during Signoff's five-length success in the Medownick Laser Clinic Handicap (2500m).

Signoff had suffered one defeat in his previous six starts but the import was never threatened once Rawiller took the four-year-old to the lead.

The Authorized gelding outsprinted his opposition but Weir refused to get carried away with Signoff's success.

"A lot of the opposition were jumpers," Weir said.

Owner Gerry Ryan said Signoff was "more of a genuine stayer" than stable star Puissance De Lune who was among the favourites for last year's Melbourne Cup before sustaining a leg injury.

Weir will not change his pre-race plan to spell Signoff ahead of a spring campaign.

The trainer said Signoff would be the perfect Bendigo Cup horse next season.

Puissance De Lune won the 2012 Bendigo Cup by eight lengths before repeating the effort with a five-length win in the Group Three Queen Elizabeth Stakes.

Weir's treble took him to 59 Melbourne wins for the season, 21 more than his nearest rival Peter Moody.