alright my 93 xj has 220,xxx miles on it, 4.0 I6 5 speed manual. i have heard of plenty of guys doing seafoam with this mileage or more, the only thing is my jeep leaks a bit of oil as it is now so i dont want the seafoam to clean out anything that might be helping keep it in. im leaving it up to you guys. take the poll and after a bunch of people give their opinion i will decide.

 

my 93 has about 190,000 on it and i just seafoam'd the engine it actually idles better then before so always good and no bad side effects of it the seafoam will be cleaning the inside of the intake manifold and in the the heads and cyclinders so it shouldnt cause any issues with oil leaking since it wont touch the oil.

Also i think i killed all the insects within a 10 mile radius of my house after doing it LOL the smoke cloud was huge.

 

of coarse

seafoam all three systems