Lap-by-Lap: Michigan

• Lap 200: Robby Gordon blows and engine, but Jeremy Mayfield's gamble pays off with a fuel-mileage victory in the GFS Marketplace 400.

• Tony Stewart (fifth) and Jimmie Johnson (10th) lock up berths in the Chase for the Nextel Cup.

• Lap 195: Top five: Tony Raines, Jeremy Mayfield (who can make it on fuel), Scott Riggs, Michael Waltrip and Joe Nemechek.

• Lap 191: Carl Edwards makes a fuel-only stop. Rusty Wallace and Jamie McMurray also stop.

• Lap 190: Top five: Carl Edwards, Rusty Wallace, Dale Earnhardt Jr., Sterling Marlin and Jamie McMurray. ... Tony Stewart pits for right-side tires and fuel.

• Lap 188: Jimmie Johnson pits for fuel and four tires.

• Lap 185: Ryan Newman pits for fuel and right-side tires. ... Leader Carl Edwards will have to pit on Lap 195.

• Lap 184: Greg Biffle and Mark Martin make green-flag stops. ... Robby Gordon runs out of gas, but will roll to his pit.

• Lap 182: Matt Kenseth stops for fuel in 6.2 seconds. Kurt Busch and Casey Mears also make green-flag stops.

• Lap 180: Fuel is going to be an issue for the front-runners. The top five: Carl Edwards, Tony Stewart, Matt Kenseth, Jimmie Johnson and Greg Biffle.

• Lap 176: Travis Kvapil scrapes the wall -- no caution.

• Lap 175: Carl Edwards passes Matt Kenseth for the lead.

• Lap 170: If fuel mileage comes into play, Joe Nemechek (currently 20th) and Jeremy Mayfield (23rd) can go the distance without another stop.

• Lap 166 -- Matt Kenseth again passes Kurt Busch for the lead.

• Lap 165 -- Kurt Busch and Matt Kenseth jockey around to get the trash off the front grille of the No. 17 car.

• Lap 150 -- Roush Racing's Kurt Busch, Matt Kenseth and Mark Martin lead the field back to green, with Casey Mears and Ryan Newman also in the top five.

• Lap 143 -- CAUTION: Stuart Kirby cuts a left-rear tire, moves up the track and collects Travis Kvapil. ... Leader Kurt Busch, second-place Matt Kenseth and third-place Mark Martin stay out -- but the other front-runners head to pit road.

• Jeff Gordon and Michael Waltrip top-off their fuel on the last lap under caution (Lap 149).

• Lap 140 -- Thrity-three cars are on the lead lap, with Terry Labonte (one lap down), Dave Blaney (-1), Kyle Petty (-1), Stuart Kirby (-2), Bobby Hamilton Jr. (-2), Jimmy Spencer (-3), Mike Bliss (-14) and Elliott Sadler (-24) off the pace. ... Johnny Benson and Kyle Busch are out of the race.

• Lap 134 -- Green-flag racing resumes with Roush Racing's Kurt Busch, Matt Kenseth and Carl Edwards running 1-3. Jimmie Johnson and Mark Martin round out the top five.

• Lap 128 -- CAUTION: Johnny Benson's engine blows up. ... This is a much-needed break for the front-runners, who now can pit and open up the front air dam by taking off tape. ... Kevin Harvick gets the "lucky dog" pass. ... Leaders to pit road: Jimmie Johnson doesn't win the race off pit road, but the No. 48 team fuels a 13.7-second stop.

• Greg Biffle stops twice to give the crew a chance to fill the radiator.

• Lap 125 -- The top 10: Kurt Busch, Matt Kenseth, Greg Biffle, Tony Stewart, Jimmie Johnson, Mark Martin, Dale Earnhardt. Jr., Ryan Newman and Sterling Marlin.

• Lap 120 -- Mark Martin is fading a bit, down to seventh, behind Kurt Busch, Matt Kenseth, Greg Biffle, Tony Stewart, Carl Edwards and Jimmie Johnson.

• Lap 113 -- Kurt Busch again is on point, passing Roush teammate Greg Biffle, with Matt Kenseth and Mark Martin running third and fourth.

• Lap 110 -- Greg Biffle passes Scott Riggs for the lead, but Kurt Busch and Matt Kenseth are coming fast.

• Lap 102 -- Green-flag racing resumes with Scott Riggs, Greg Biffle, Jeff Green, Mark Martin and Matt Kenseth in the top five.

• Lap 99 -- Scott Riggs stays out during the caution and is the race leader, while Gregg Biffle -- who took two tires -- is second. ... Kasey Kahne to pit road; the No. 9 car has a busted left-rear shock mount.

• Lap 95 -- CAUTION: Yellow is out for debris in Turn 1. ... Johnny Benson gets the "lucky dog" pass. ... Leaders come to pit road: Matt Kenseth turns in a sub-14-seconds stop -- 13.7 -- while Kurt Busch and Jimmie Johnson are in-and-out in 14.1 seconds.

• NASCAR says the rash of tire problems stems from the tires being "cut" by something on the track.

• Ricky Rudd pitted too soon and has been sent to the end of the longest line.

• Lap 93 -- Kurt Busch passes Matt Kenseth for the lead. ... Terry Labonte off the track; flat left-rear tire.

• Lap 92 -- Matt Kenseth passes Kurt Busch for the lead. ... Kevin Harvick off the track; flat left-rear tire.

• Lap 87 -- Kurt Busch and Matt Kenseth freight-train past Mark Martin, who drops to third.

• Lap 86 -- Mark Martin leads the field to the green for the restart. Kurt Busch is second and Mat Kenseth third.

• Lap 82 -- CAUTION: Kyle Busch comes to pit road with smoke billowing from the car; the engine expires after overheating. ... Meanwhile, Chase contender Elliott Sadler smacks the wall coming off Turn 2. ... Scott Wimmer gets the "lucky dog" pass.

• Lap 80 -- Green-flag racing resumes with Mark Martin, Kurt Busch, Greg Biffle, Tony Stewart and Carl Edwards in the top five. Nos. 6-10: Matt Kenseth, Elliott Sadler, Jimmie Johnson, Ryan Newman and Ricky Rudd.

• Lap 74 -- CAUTION: Race leader Joe Nemechek blows the right-front tire and scrapes the wall. ... John Andretti gets the "lucky dog" pass. ... Leaders come to pit road: Kurt Busch has a four-tire change in 14.3 seconds -- and still loses a spot to teammate Mark Martin coming back to the track.

• Lap 70-- Joe Nemechek continues to hold off the charge of Roush Racing's best: Kurt Busch (second), Mark Martin (third), Greg Biffle (fourth) and Carl Edwards (fifth). Matt Kenseth -- Roush's fifth car -- is running seventh.

• Lap 69 -- Rusty Wallace in for an unscheduled pit stop -- also for debris on the front. ... Could a hot dog wrapper play a large role in determining the outcome of today's race -- and drivers' chances for making the Chase.

• Lap 62 -- Kasey Kahne to pit road for debris on the front air dam. He loses one lap to the leaders.

• Lap 60 -- The top 10: Joe Nemechek, Kurt Busch, Mark Martin, Kasey Kahne, Carl Edwards, Greg Biffle, Matt Kenseth, Tony Stewart, Elliott Sadler and Jimmie Johnson.

• Lap 55 -- Kyle Busch comes to pit road for an unscheduled stop; trash on the front grille (the crew changes left-side tires). the crew keeps Busch on the lead lap. ... Joe Nemechek still is being pursued by on-the-move Kurt Busch.

• Lap 48 -- Pole-sitter Joe Nemechek passes Kyle Busch to regain the lead.

• Lap 45 -- Roush Racing's dominance at MIS is coming into play: Kurt Busch (third), Mark Martin (fourth), Carl Edwards (sixth), Greg Biffle (ninth) and Matt Kenseth (11th).

• Lap 40 -- The top five: Kyle Busch, Joe Nemechek, Mark Martin, Jeff Gordon and Kurt Busch.

• Lap 38 -- Kyle Busch leads the field back to the green flag.

• Lap 34 -- CAUTION: Mike Bliss blows a left-rear tire and spins. ... The leaders stay on the track. ... Jeff Green gets the "lucky dog" pass.

• Lap 31 -- Green-flag racing resumes with Kyle Busch, Joe Nemechek, Mark Martin, Jeff Gordon and Ryan Newman in the top five. The rest of the top 10: Kasey Kahne, Carl Edwards, Elliott Sadler, Kurt Busch and Ricky Rudd.

• Lap 27 -- CAUTION: Debris in Turn 2. ... Sterling Marlin gets the "lucky dog" pass. ... Thirty-eight cars come to pit road. Leader Kyle Busch is in-and-out in 14.5 seconds followed by Joe Nemechek in 15.4. ... Kasey Kahne, who came in second, has a 16-second stop and loses four positions.

• Lap 25 -- Jeff Green has a flat left-rear tire. No caution -- yet.

• Lap 20 -- Sterling Marlin on pit road for debris blocking air flow to the radiator.

• Lap 19 -- Kyle Busch takes the lead from Kasey Kahne.

• Lap 15 -- The top five: Kasey Kahne, Kyle Busch, Joe Nemechek, Jeff Gordon and Ryan Newman. ... And Busch has pulled within 0.51 seconds of Kahne.

• Lap 12 -- Kyle Busch passes pole-sitter Joe Nemechek for second place. Busch is more than 1.42 seconds behind leader Kasey Kahne.

• Lap 10 -- Kasey Kahne has checked out, now leading Joe Nemechek by more than 1.10 seconds.

• Lap 5 -- Kasey Kahne is the race leader, followed by Joe Nemechek, Kyle Busch, Jeff Gordon and Mike Bliss.

• Lap 4 -- Kasey Kahne and Kyle Busch pass Jeff Gordon and set their sights on leader Joe Nemechek.

• Lap 1 -- Joe Nemechek and Jeff Gordon remain 1-2 after the first lap.

• 2:43 p.m. -- Green flag flies at Michigan.

• 2:38 p.m. -- In this week's "Wally's World," CNN senior medical correspondent Dr. Sanjay Gupta seems to enjoy riding along with Wally Dallenbach. Lots of smiling between those two guys.

• 2:33 p.m. -- Gentlemen, start your engines!

• RIP Harold Parsons

• 2:25 p.m. -- Julie Roberts sings the national anthem. ... We've heard worse, but right now we can't remember who.

• 2:18 p.m. -- Jimmie Johnson, who qualified 10th, will start at the rear of the field (engine change). He says it's no big deal; Michigan is conducive to winning from the back of the pack. ... What else did you expect him to say? ... Rusty Wallace will join Johnson at the back of the pack. The No. 2 team changed the car's transmission.

• With four races remaining until the Chase for the Nextel Cup begins at New Hampshire, the series is at Michigan for today's GFS Marketplace 400. Tony Stewart is the points leader, buoyed by back-to-back wins at Indianapolis and Watkins Glen. Can he be the first driver since Jimmie Johnson -- at Charlotte, Martinsville and Atlanta last fall -- to win three in a row? Stay tuned!

Stewart has to finish 21st or better today (98 points) to clinch a berth in the Chase (on the assumption that he starts the remaining three races).

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