Fuel

The GS500 requires 87 octane fuel.

The fuel tank capacity (gallons) is as follows:

California, pre-2000: 4.0 total, 0.9 reserve
Non-CA, pre-2000: 4.3 total, 0.9 reserve
California, 2001+: 5.0 total, 1.0 reserve
Non-CA, 2001+: 5.3 total, 1.0 reserve