After each race of the IndyCar Series season, ESPN.com open-wheel correspondent John Oreovicz will rank the top 10 drivers in the series. Don't agree with Oreo's list? Let him -- and the whole world -- know in the Conversation section at the bottom of the page.

New this week
Mario Moraes.

Dropped out
Hideki Mutoh.

Biggest mover
Graham Rahal moved up three spots from eighth to fifth.

Biggest loser
Danica Patrick fell three spots from sixth to ninth.

2009 IndyCar Series Power Rankings - Week 16
	RK(LW)	DRIVER	TOP 10s	COMMENT
	1 (2)	Ryan Briscoe	12	No doubt about it: Briscoe packs the most power in IndyCar after August surge. He has one fewer race win than the Ganassi drivers, but seven runner-up finishes give him a solid championship lead.
	2 (1)	Dario Franchitti	13	Ran strongly at Chicagoland but not strong enough to contend for the win. Comeback season hasn't disappointed, but Dario will probably need some misfortune for Briscoe to grab a second IndyCar title.
	3 (3)	Scott Dixon	12	Just can't get over the hump to win at Chicagoland, where Dixon has now finished second five times. Admitted after the race that Penske has a pure speed edge over Ganassi right now.
	4 (4)	Helio Castroneves	8	After the excitement of being cleared of federal tax charges and an emotional Indianapolis 500 victory, Helio was perhaps due for a letdown. Only three top-4 finishes since he won at Texas in early June.
	5 (8)	Graham Rahal	8	Not winning races but beginning to consistently finish in the top group. Chicagoland was arguably GR's best oval race to date, and he nearly pulled off a hometown victory for Newman/Haas/Lanigan Racing.
	6 (5)	Tony Kanaan	9	TK got in team owner Michael Andretti's grille after the Chicagoland race, unhappy with a lack of cooperation from his teammates -- mainly Marco Andretti. Bad season getting worse.
	7 (7)	Marco Andretti	8	Ran the high line at Chicagoland with the best of them but ultimately brushed the wall. Worked back up to fourth place but ultimately finished 11th.
	8 (9)	Justin Wilson	6	JW and Dale Coyne Racing have made quiet gains on their oval setup this year and were rewarded with a top-10 at Chicagoland. Forward progress continues.
	9 (6)	Danica Patrick	9	Despite just two top-10s in the past seven races, Danica has held on to fifth place in the point standings. But she has conspicuously slipped since starting the season with six top-6s in the first eight events.
	10	Mario Moraes	4	Young wild man showing signs of patience with career-best finishes in the past two IndyCar races, including a podium at Chicagoland. Could really shine if KV Racing can hire an experienced teammate.