Turner was the only batter to trouble the Thunder bowlers, with the skipper belting 61 from 37 balls to help his side to 9-142 from 20 overs on Wednesday night.
The Scorchers were in trouble early after winning the bat flip, the home side reeling at 2-10 after the first four power play overs, with their first boundary coming off the fourth ball of the fifth over.
The next one didn't come until the second-to-last ball of the 10th over, as the Scorchers crawled to 4-47 at the halfway point of their innings.
In his final appearance of the tournament, South African star Faf du Plessis (1) went cheaply, caught at third man after he top-edged a ramp shot.
It continued a lean run at Optus Stadium for the former Test skipper, who made scores of 14, 6, 3 and 1 in front of home fans to finish with a total of 163 runs, including a high score of 68, from his seven innings.
Oliver Davies' younger brother Joel made his BBL debut and was never far from the action, catching Cameron Bancroft (2) and Nick Hobson (16) and firing searing balls in from the deep that saw Adam Lyth (11) and Matt Kelly (17) run out.
The 19-year-old left-arm spinner finished with figures of 0-23 from his three overs.
Chris Green (1-15 from four overs) was economical, while Nathan McAndrew (3-29 from four) removed danger man Turner as he accelerated towards the back end of the innings.
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