End of November last year i installed a UPR catch can, they are local for me so i just swung by and picked it up, it was a quick and easy install. About a month ago i had a little issue with an O ring so i went by to have it checked out and one of the techs “Joe” in no time had it diagnosed and fixed, great company and great people, and at the same time while we were shooting the bull he looked over all of the hoses and fittings and disconnected the hose going into the intake tube and notice an oil sheen, residue and he suggested a catch can for the drivers side, we got talking about oils and which one i used and suggested Royal Purple as that oils vapor/mist, according to Joe, doesn’t ignite like others may. I didn’t think much of it until i saw the video Lil Hemi posted about LSPI and also saw the condition of my throttle body and intake snout of my supercharger when i took it off to install the DDR spacer and CAI, the throttle plate had a few speckles of oil on it and the body a little bit of soot around the edges, the SC’s intake snout also had some soot and a bit of that oil sheen/residue so i imagine the oil vapor or mist mixing in and messing with octane and combustion. In hind site i should have taken some pics but but forgot, just went straight to cleaning the TB and snout, i did take a pic of the rag though lol, so Friday i went to UPR and took Joe up on getting me a drivers side catch can, awesome engineering and install. Apparently you must keep the hose that goes from the valve cover to the intake tube as short as possible, hence the catch can placed as close as possible to the valve cover, this oil line has an in line sensor measuring pressure? Flow? Or combination and if the hose is to long it alters the sampling rate and triggers a MIL light.