How much gas does a 1995 Oldsmobile Delta eighty eight royale hold and What is the miles per gallon for said car?

The 1995 Oldsmobile Delta 88 Royale's fuel tank capacity varied slightly depending on the engine and options. Most sources cite a fuel tank capacity of 16 gallons.

The miles per gallon (MPG) for a 1995 Oldsmobile Delta 88 Royale is also variable, depending on engine size, driving conditions, and the car's condition. You'll likely find the EPA estimated MPG to be in the range of 18-22 mpg combined (city and highway). However, real-world MPG could be lower or higher than these estimates. Keep in mind that these are just estimates - actual mileage will vary.