Amsoil P.i. and Upper Cylinder Lube

/ p.i., Synthetic Oils, Upper Cylinder lube / By


“P.i and Upper Cylinder Lube work in tandem to address common issues many drivers encounter. Both can be used together.

  • Decreased fuel economy
  • Increased exhaust emissions
  • Power loss
  • Poor starting and rough idle
  • Pre-ignition “knock” or “pinging””