My car is a 2016 Scion IM 1.8 liter. I had poor engine idle and I put a can of Sea Foam in the tank and did an upper engine clean with the Sea Foam Spray through the throttle body. It helped a little. I was told by my mechanic to check the PCV valve. The location for the PCV valve is underneath the intake manifold on this car and a pain to get to. Is there a way to clean the PCV valve with Sea Foam without removing the valve? Would an oil treatment help with the PCV system? I was thinking of doing an oil Sea Foam treatment, but I am concerned because my Scion uses zero weight oil. Would it be OK to use? Also, will Sea Foam Spray have an effect on plastic intake manifolds?
Those are great questions Jason. In order: (1) Get a second opinion about cleaning the PCV. Keep in mind that your Scion is only 3 years old. Have you checked the fuel filter? (2) Adding Sea Foam to your Scion’s oil crankcase is a great idea. Sea Foam works great in all oil weights, including zero weight. (3) Sea Foam Spray will not affect a plastic manifold. You’re good to go on all fronts!