I've noticed rattling/knocking noise at higher RPMs in my 2000 corolla, usually right before the automatic shifts to the next gear. I have heard a lot about seafoam, but I'm a complete noob when it comes to mechanical things like engines. I'm about due for another oil change (this time I will buy an oil filter wrench cap thingy and make sure I can loosen the filter before draining the oil out of the car. I only went about 2000 miles since I didn't get to change the filter). I was wondering if seafoam treatment is easy enough for a novice like myself? Also, I see that there are multiple places to introduce the seafoam. Where would be the best place for me to put it based on my car's symptoms? Thanks!
