The Dodge guys sometimes did “the vent kit mod” on the fuel tank which may be similar. The idea with using first auto-shutoff was for sake of consistency fill-to-fill over a test range. So, whatever works. Records are the thing, as you note. I’d add some pics to those records. Reminders.
And don’t forget engine hours. Even if the only timer is the phone. Calculating average mph is what separates smart travel speed decisions from those that are not.
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