Y Yacajoo New member Nov 28, 2010 #1 I put some seafoam in my highlander's gas tank only. I started getting much worst gas mileage and vibrates a lot when stopped at a red light. What's up with that?
I put some seafoam in my highlander's gas tank only. I started getting much worst gas mileage and vibrates a lot when stopped at a red light. What's up with that?
