2006 American Le Mans Series season

The 2006 American Le Mans Series season was the 36th season for the IMSA GT Championship, with the eighth as the American Le Mans Series. It was a series for Le Mans Prototypes (LMP) and Grand Touring (GT) race cars divided into 4 classes: LMP1, LMP2, GT1, and GT2. It began March 18, 2006, and ended October 21, 2006 after 10 races.

Among the biggest announcements prior to the start of the 2006 season was that Audi would continue their involvement in the ALMS with their new R10 TDI diesel engined LMP1 with the car making its international racing debut at the 12 Hours of Sebring in preparation for Le Mans. Audi followed up this announcement with plans for a single Audi R8 to go on a farewell tour for the first few races after Sebring, and then be replaced by two new R10 TDI after Le Mans for the rest of the ALMS season.

Fellow LMP1 competitors Dyson Racing also announced an upgrade from their troublesome Lola EX257s to brand new B06/10s with the new AER Turbo V8 engine unit. As part of their purchase, Dyson in turn sold off their EX257s. Occasional ALMS entrant Autocon Motorsports bought one chassis, while former Intersport partner Highcroft Racing bought the other, leading to an enlarged LMP1 field for 2006.

In LMP2 the teams of Miracle Motorsports, B-K Motorsports, Intersport Racing, and Penske Racing all planned to make a return to the series. Penske's initial one-car effort towards the end of 2005 was expanded to two cars for 2006, while the four other teams kept their efforts the same.

In GT1, the field appeared to be shrinking. Corvette Racing's commitment was certain, but Aston Martin Racing, now running Pirelli tires instead of Michelin, was only able to promise Sebring in the beginning, later stating they'd also run Houston and Mid-Ohio in preparation for Le Mans. Their involvement for the rest of the season was left as merely a rumor. ACEMCO Motorsports's future in ALMS was also uncertain, with the team scrounging for cash to be able to continue racing. Former GT1 team Carsport America finally folded following the 2005 season, with their Dodge Viper GTS-R greatly outdated. The involvement of Maserati in the series was also pulled due to the cancelling of the project by the corporate heads since it never reached its initial plans, and the continued restrictions put in place by IMSA.

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