Product review videos aren't what we normally do but in this case we've got a P0420 Catalyst Efficiency code repeatedly popping up on the Pontiac Vibe GT and figured this would be a good chance to test some "over the counter" products! So let's do some scientific testing shall we?
Product number 1, the classic Seafoam. Product number 2, Rislone Fuel, Exhaust & Emission system cleaner, Product number 3, CRC Guaranteed to pass Emissions System Cleaner, Product 4 Berryman B12. These 4 are all products sold over the counter at just about any auto parts store and are purported to "fix" or at least temporarily improve the issue we are currently having.
Just before the making of this video we HAVE installed a brand new FlowMaster 2.5inch high flow catalytic converter, running the factory original rear o2 sensor in the factory location on factory pipe.
