SD Rebel
Spends too much time on here
also i would like to add, unless it changed for the 5th gen, when eco light is on, its only means your driving in a eco way,
the eco light does not equal to mds v8 going in 4 cyl mode, you can have the eco light on and still be runing 8 cyl.
the eco light will be on when the mds engage but it can also be on with mds not engage
On 5th gens it's confirmed Eco = MDS.