In my 98 corolla I started the 1st phase of Auto RX about 1200 miles ago with Supertech 10w40. Just a few days ago after a 200 mile road trip it started ticking loudly untill the car warms up fully, usually after 10 minutes of driving in the morning. This car has a sewing machine sound as do most corollas but this is much louder. The untrained ear could hear this from 10 yards away. The auto RX site says noise is normal and will go away during the rinse phase, but some people are telling me the 10w40 is too thick for the corolla and I need to get some 5w30 in there. I was using the 10w40 to try to reduce consumption. I have 107000 miles.
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