Lap-by-Lap: Dover

CHECKERED FLAG: Martin Truex Jr. wins the Autism Speaks 400, his first career victory in the Nexel Cup Series.

Lap 399 -- WHITE FLAG: Martin Truex Jr. is in cruise control as he dices through lapped traffic.

Lap 397 -- The lead for Martin Truex Jr. is now more than 6 seconds.

Lap 395 -- Jeff Gordon nearly hits the wall after racing hard with Greg Biffle.

Lap 390 -- Martin Truex Jr.'s lead is 4.629 seconds ahead of Ryan Newman.

Lap 382 -- Jimmie Johnson heads to pit road with a flat rear tire. He was running second at the time, but wore out his right-rear tire in chasing Martin Truex Jr.

Lap 370 -- Jimmie Johnson gets by Ryan Newman to take second.

Lap 362 -- GREEN FLAG: Martin Truex Jr. leads the field to green.
1. Martin Truex Jr.
2. Ryan Newman
3. Jimmie Johnson
4. Carl Edwards
5. Clint Bowyer

Lap 357 -- The top five stay out, but the rest of the lead-lap cars pit:
• Jeff Gordon seeks major adjustments and gets them
• Matt Kenseth gets adjustments and four tires

Lap 356 -- YELLOW FLAG NO. 7: David Gilliland spins and collects teammate Ricky Rudd.

Lap 349 -- Jimmie Johnson tries to pass Ryan Newman, but he gets loose and backs off, saving himself from crashing.

Lap 348 -- LEAD CHANGE: Martin Truex Jr. goes by Ryan Newman to take the lead, but Jimmie Johnson is charging hard in third.

Lap 343 -- GREEN FLAG: Ryan Newman leads the field to green.
1. Ryan Newman
2. Martin Truex Jr.
3. Carl Edwards
4. Jimmie Johnson
5. Clint Bowyer

Lap 340 -- Kasey Kahne and Jeff Burton are the only lead-lap cars to pit.

Lap 338 -- YELLOW FLAG NO. 6: Michael Waltrip spins out with a flat tire.

Lap 333 -- GREEN FLAG: Ryan Newman gets the race going again.
1. Ryan Newman
2. Martin Truex Jr.
3. Carl Edwards
4. Clint Bowyer
5. Jimmie Johnson (Continued)