What size is the fuel tank on a 1999 Ford F-250 crew cab long bed super duty diesel power stroke 7.3 liter?

The 1999 Ford F-250 Super Duty Crew Cab Long Bed with the 7.3L Power Stroke diesel engine typically had a 38-gallon fuel tank. However, it's always best to verify this by checking your owner's manual or looking at the fuel tank itself (often a sticker is present with the capacity). Some trucks might have had optional larger tanks, although this was less common.