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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L And 6.2L - Introduction (2 Of 2)) >> Description and Operation >> Fuel System Description >> Switching Between Gasoline and E85

Switching Between Gasoline and E85

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No special precautions need to be taken when switching back and forth between gasoline and E85 other than re-fueling events must be 7.5 Liters (2 gallons) or greater, and the vehicle must remain in closed loop long enough, usually by the time the engine has maintained full operating temperature, to calculate the composition of the new blend in the tank.