Kevin just put 13.38 gallons of fuel into his car. There were 5.7 gallons in the car to begin with. How much fuel is Kevin's car now?

To find out how much fuel is Kevin's car now, we need to add the initial amount of fuel to the amount he just put in.

Initial amount of fuel = 5.7 gallons
Amount Kevin just put in = 13.38 gallons

Total amount of fuel in Kevin's car = Initial amount + Amount just put in = 5.7 + 13.38 = <<5.7+13.38=19.08>>19.08 gallons.

Therefore, Kevin's car has 19.08 gallons of fuel now.