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So that gallon of toluene seems to be doing something. It doesn't feel faster. The fuel gauge seems to be dropping at the same rate. My check engine light still comes on sometimes and leaves EGR and temperature sensor codes. But... I've found myself looking down at the speedometer only to discover I'm going a little more than ten miles per hour faster than I was expecting. It doesn't seem to make any difference around town, but I think I may be getting quite a bit more top-end. ...that or the placebo effect is amazing.
Normally I go up certain hills on my commute at about 65 with the torque converter locked up. It unlocks if I go much faster. I've found myself above 80 three times now with the torque converter locked up and I didn't even notice until I started wondering why traffic around me seemed to be moving so slowly.
Driveability so far is otherwise unaffected. It'll be at least another week before I can check for any fuel economy changes.
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