It was about a month before i noticed, i came upon it by accident actually. The full story is: i found a local gas station that sold e85 and i did the switch, about a hr later i tuned my car to 33psi on a pte scm61. God the car was fast as hell
Fastest dsm ive ever driven. About 2 days of running that big boost i blew the hg lol, ran around like that for a couple weeks before i pulled the head to have it o-ringed and swap hg. To my suprise when i looked at the intake side of the head i had these HUGE trail marks of black goo. After i installed the new hg, the car was wouldnt start and was getting a huge e85 smell, checked the oil dipstick and i was like 2-3 times above the line. Drained the pan and it smelled horribly of e85, pulled the injectors (soaked them in gasoline), drained the gas tank and put some fresh 93 in it and the car started up after a few cranks.
I would post a pic of what the intake runner looked like but i only have them saved to my harddrive not on the net.