Adding Seafoam to my oil (bottle says you can do it).

DON’T DO IT.

I had a ‘94 Civic. 235k miles. Ran like a charm, never any engine issues, always changed oil/filter myself religiously, mostly synthetics. I was buying oil at Autozone and let myself get talked into buying Seafoam. Read the bottle and it said you can add to your oil, then change the oil ~50miles later. Which I did. Couple weeks later my family is 80 miles into a cross country move and I’m driving the Civic. Oil light comes on. We were next to an exit right at that time, managed to get it to a shop. They dropped the oil pan and said the oil screen was full of all kind of gunk, oil wasn’t getting through. They cleaned it out, replaced oil, put me back on the road. 80-100miles later, same thing. Except the engine blew.

I miss that car.

DON’T PUT ADDITIVES IN YOUR OIL.