Damien Oliver has signed off from Melbourne racing for the season with a winning double at Sandown and a handy lead in the premiership.

Oliver will have a six-week stint in Mauritius after he competes at Saturday's feature Stradbroke Handicap meeting in Brisbane.

He notched his 58th Melbourne winner for the season when he guided the Robert Smerdon-trained two-year-old Cautious to a half-head victory over My Lucky Strike in Wednesday's Equiano-King Of Speed Handicap.

In the process, Oliver became the first jockey whose mounts on Victorian tracks had earned a combined $10 million in a season.

Oliver added another victory on the Anthony Freedman-trained Mista Spot in the Sportingbet Best Tote Plus Handicap. Both his wins were pick-up rides with Nick Hall and Michael Rodd missing the meeting.

He is 22 wins ahead in the premiership after a season which has included victories in the Melbourne Cup and Australian Cup on Fiorente.

Oliver returned to riding in September after a 10-month ban for a betting offence.

"I couldn't have dreamed of a better season," Oliver said.

"I didn't come back until September and the last couple of months I've been away on the Saturdays (riding interstate).

"Winning the Melbourne Cup and Australian Cup on Fiorente are certainly the highlights, but the consistency all year has been great and I've had a lot of support from a lot of stables."

Oliver said the Mauritius stint was an opportunity to have a working holiday during off-season racing in Melbourne.

"I'm really looking forward to it," he said.

"I always take a bit of a break over the winter and it's an opportunity to get away and keep my eye in with some riding but also have a bit of a holiday too.

Cautious is raced by Sheikh Fahad Al Thani's Qatar Bloodstock which Smerdon predicts will become a big player in Australian racing in the coming years.

"They (Qatar Bloodstock) are going to be a force to be reckoned with going forward," Smerdon, who has raced three horses for Qatar Bloodstock, said.

"Their presence here will be significant in time to come."