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Two red stripes. Smooth Ride

Caltex™ with Techron® keeps your engine clean on the inside, helping you to experience a smoother drive.

How do port fuel injector (PFI) deposits form?

Port fuel injector (PFI) deposits form during the hot soak period after the engine has been turned off. The stationary gasoline trapped in the injector tip is exposed to a higher temperature for a longer time than the fuel that flowed through the injector when the engine was running. The heat degrades the fuel, initiating deposit formation. In the absence of an effective additive, injector deposits can form quite rapidly if the car is used predominantly for short trips.

Cold-start and warm-up driveability can be adversely affected as intake valve deposits can act somewhat like a sponge, absorbing and then releasing fuel, which upsets the ratio of fuel and air, particularly as the engine is changing speed.

Other valve deposit problems include valve sticking caused by deposits interfering with the valve stem sliding in its guide.



  • Power.
  • Economy.
  • Reliability.
  • Fewer Emissions.
  • Smooth Ride.