well taking out the 2 o2 sensors and running open loop 24/7 has not decreased my gas milage at all... i still get 27 mpg ..not bad for a s1 tranny.. so yeah .. im happy and the other thing is that the c.e.l comes on every now and then, its gone when i turn the car off and back on again tho.

 

Ditto, my mileage seems to be holding steady... niiiiice