When i put the Seafoam in, I need to go about 150-200 miles and change the oil correct. I currently use Castrol GTX 5W30, after the Seafoam treatment, should I switch to 10w 30 and see if that helps as well....Sorry guys I know Iam a PIA with my questions, but I am anal on how my vehicles run. Thank you in advance
Which one is better to use AUTO RX or Seafoam, or will they both do the same thing