Here's the facts: Bentley manual for 63 67 transporter shows fuel capacity of 40 liters with no differentiation for the 67. 67 owner's manual dated August 66 shows fuel capacity of 40 liters. 67 owner's manual dated December 66 show's fuel capacity of 10.6 gallons US which is essentially 40 liters, Though 40 liters rounds off closer to 10.5 gallons US. 68 owner's manual dated December 67 shows fuel capacity of 60 liters or 16 gallons US, a 50% increase over the split tank. Sammie