seafoam will be fine, the amount of carbon it would take to fall in and ruin your 2.5 would probably inhibit its ability to run at all before you did the seafoam. I would recommend adding it half to your oil (careful not to overfill) and half to your gas. ive heard of some people assign it through the throttle body, and thats ok, but its not going to do really anything. taking the throttle body off and cleaning it that way is easier and safer to do a good thorough cleaning of that piece. seafoam wont clean your throttle body anywhere you put it.
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