The main features of this unit are a high - pressure fuel system with direct injection, variable intake system, low - friction oil seals, and piston cooling - jets. (kiamedia.com)
As for the life of the motor, the double oil sealed shaft protects it from dust and debris. (geekwrapped.com)
The hot oil seals the outside of the donut and then gently cooks the inside with the heat of the oil. (glutenfreeonashoestring.com)