What is the unusable fuel capacity (red line 'E') in US gallons?

What is the unusable fuel capacity (red line 'E') in US gallons?

• A. 1.5 US Gallons
• B. 0.75 US Gallons per tank
• C. 3.0 US Gallons
• D. 2.0 US Gallons

Answer: (A)

The red line at E marks the reserve portion of fuel that cannot be used by the engine because of how the fuel pickup and tank are designed. This unusable amount ensures the fuel pump stays submerged and provides a small safety margin so you don’t run completely dry. In many vehicles, this reserve is about one and a half gallons, so the unusable fuel capacity is 1.5 US gallons. Values like 0.75 or 2.0 or 3.0 gallons would imply a different tank design or reserve amount than what is indicated by this standard gauge marking.

The red line at E marks the reserve portion of fuel that cannot be used by the engine because of how the fuel pickup and tank are designed. This unusable amount ensures the fuel pump stays submerged and provides a small safety margin so you don’t run completely dry. In many vehicles, this reserve is about one and a half gallons, so the unusable fuel capacity is 1.5 US gallons. Values like 0.75 or 2.0 or 3.0 gallons would imply a different tank design or reserve amount than what is indicated by this standard gauge marking.