I'm in for my first MOT test with B in a couple of days and I've seen from the two previous protocols that the lambda value was 1.01 and 1.03 (the allowed interval is between 0.97 and 1.03)... Anything I can do to have a better chance not to get a too high value? Driving around for a while to have the right temperatures, or is it better to keep her cold just before the test?