Just thought I'd share my recent etest pass experience.

8L of metal hydrate from Canadian tire, 1/8th of a tank of 94 octane gas (not on purpose but it's what was already in the tank), pulled 5 degrees of timing in the low and high speed idle cells and had leaned out the idle to just below 16 afr, took her for a little run to warm up my vibrant high flow metal core cat (2seasons old) and she passed with colours....not exactly flying Haha. This was on SD not a MAF.

I passed with a MAF, new vibrant cat in the down pipe and 950cc injectors (dialed in) 2 years ago no problem.