I have carbon build up on my #4 and #5 fuel injectors and I saw that others on this forum suggest cleaning the injectors by soaking in Marvel mystery oil for a few days. I mentioned this to my mechanic and he said that MMO is too strong so do not do it. I thought I might try to see what soaking the one injector in the MMO will look like after a few days and compare it to my good injectors. Has anyone else tried cleaning really dirty injector with marvel mystery oil?
Does anyone else agree with my mechanic and am I asking for trouble by not following his advice? I figure I have nothing to lose, it is already a goner otherwise. Maybe I'm crazy.
Frankie

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Frankie
It never ends!
1985 300D Turbo 181K Anthracite grey, "SOPHIA"
1984 300 SD Turbo(sold)
2004 Subaru Forester XT,Cayenne red.