There have been reports of excessive lube oil usage in 2007 emissions-compliant Mercedes-Benz engines.
Senna would have been joined by Jenson Button and the team would have used Mercedes-Benz engines.
Both racers use the new Mercedes-Benz engine that has dominated speeds in its first appearance here in 71 years.
Roger Penske's calculated risk on the new Mercedes-Benz engine paid off with a victory in Sunday's Indianapolis 500.
For 1997, the PacWest team switched to using Firestone tyres and Mercedes-Benz engines.
They are based on heavily modified Mercedes-Benz automotive engines.
The VJM02 was powered by Mercedes-Benz engines from the 2009 season after signing a five-year deal on 10 November 2008.
From then on Ilmor built the Mercedes-Benz engines exclusively for McLaren.
The SLF200 was reengineered in 2002 to use a Mercedes-Benz engine and electrics.
The collaboration marks the first production of Mercedes-Benz engines in the North America Free Trade region.