Ahh, the age old question, to fog or not to fog. If you fog with the choke out method you risk fauling your plugs also. The reason on a Cat system not to use the fog/choke method is you will mess up your O2 sensors, you prob have 2 for each side. I have used the spray fogging oil in each cylinder for the last 3 years, plugs are fine as well as the O2 sensors. Ir is kind of a pain, but really only takes about 15 minutes to do it.
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