For the best performance out of your x18 x19 x22 super pocket bikes it is recommended you use premium gas - 91 & 93. Regular gas is fine as well (87) but considering you are using a small engine, the cleaner the gas the better it is for an engine.
DO NOT USE DEISLE
The 2016 Venom x19 Super Pocket Bike has a powerful 4-stroke 110cc Engine, so you do NOT have to mix oil and gas. Just add fresh gas to the tank.
There is a oil pan located at the bottom of the engine and a dip stick on the side of the engine on the right side. Like an car, you always want to check your oil levels. Use 10w-30 oil or 10w-40 4 stroke motorcycle oil. Change your oil every 300 miles