1995 525i 5MT, 318k miles
Didn't fail but much, any tips on getting it to pass? I will change the oil and filter before going in for the re-test. It has 91 in it now, considering trying 87 the next time (lots of mixed opinions)
15MPH (fail)
RPM 1736
CO2 - 14.7
O2 - 0.0
HC (ppm) - MEAS 81 MAX...