FYI.. the scanguage is alot more accurate in this regard. If you have the scanguage, and regularly track your fuel and use the "fillup" feature, you can drink the tank down to your last gallon with no worries

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CrewMAX 5.7 SR5
Surrey, BC Canada

LINE-X Bed Liner, Tekonsha Prodigy Brake Controller, ScanGauge II

Geddes Family Homestay - Hosting international students in Vancouver, Surrey