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[pjksr02]

Here's a link to drive patterns:

http://www.toyotapart.com/READINESS_...T-EG02-003.pdf

In my van, taking long trips is the way I keep P0420 from recurring, after I clear my codes. When I am bopping around town, stopping and going, I can almost predict when the light will come on.

Not sure if Redline actually raises octane. I tend to think it reduces acquired octane requirement--increased octane needed due to deposit build-up--through cleaning.