Quote:
Originally Posted by Istas
I'm still a bit leery about doing the aerotabs without having a way to quantify testing them, but I'm going to just take a leap and assume (until I can test them) that having just enough of them to reattach airflow to my rear window will do more good than harm.
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Do the MPGuino first. I've not heard positive results on the forums from aerotabs, but if they did work for you, it would be such a subtle change that you probably wouldn't be able to tell just from filling up. Doing a grill block is a no-brainer, but having that instant readout is important to quantify the smaller mods you'll probably have to do to get to 42 mpg.