How often can I use Sea Foam gas and oil treatment in my 2003 Chevy S10? [SOLVED]

Good question, William. As far as safety goes, you can add Sea Foam to your gas tank as often as you’d like. Adding a can to your gas tank every 3,000 miles (or 2-4 times a year) is enough to keep your fuel system clean and running strong. I’d also consider using High Mileage – it’s a strong cleaner and works great on vehicles with higher mileage.

Another tip: wait until the tank is low (1/4 -1/8 tank), and add the whole 16 oz can. Then, drive until almost empty before refueling. A high concentration like that works very well for cleaning fuel residues and deposits.

You can add Sea Foam to the oil before every oil change. However, do not exceed one treatment per oil interval, and never add more than 1 ounce of Sea Foam per quart of oil. Adding Sea Foam before every oil change will work great to progressively clean away oil residues and deposits.