2013 Toyota Tundra Double Cab Owners Manual - Page 510

4-3. Do-it-yourself maintenance Remove the oil filler cap, turning it counterclockwise. Add engine oil slowly. Checking the dipstick. Reinstall the filler cap, turning it clockwise. The approximate quantity of oil needed to raise the level between low and full on the dipstick is indicated as follows: 1.6 qt. (1.5 L, 1.3 lmp. qt.)