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Stock except for a turbosmart 50/50 bov with boost reference adapter.

A couple days after putting the redline si-1 in my tank I got a p1450 (fuel vacuum purge) code. The purge valve is new. Not sure if it’s coincidence, or if the cleaner somehow caused the code!

Yeah I usually use 91 with good results. 93 sometimes. From reputable gas stations That’s what I started thinking after I bought the stuff. I’ll see if anything feels different after running 2 bottles.

@lakestone I just got some bottles of redline si-1. This could help if the injectors aren’t spraying properly, but would it do anything if one is leaking?

I might replace the injectors then. Maybe try a fuel cleaner first and see. Ford calls for 5w-50 in the car. What advantage does Redline have? Amsoil SS is easy for me to get and the price is good. Yes this sample was taken during an complete oil change. I don't take a lot of short trips, its...

Stock Focus RS that is daily driven in 4 season North American climate. -first UOA is spring summer driving w/o catch can -recent UOA is all winter with PCV catch can (that is always empty) -mostly stop and go traffic with some open highway -always couple minutes of warm up idle in winter...