Maybe a dumb question, but does FP60 have a shelf life?
I have a bottle that's about 5 years old. It's been opened before and used, but it's been sealed and stored in my garage. Would it be fine to use or not?
I use FP60 in two muscle cars. The main effect I am looking for is to keep the intake valves clean. Its not 100% effective but is quite a bit of help. My FP60 gallon bottles last 3+years. Seems OK to me. John--Las Vegas.
I'm still using FP+. My main application is general UCL and cleaning, particularly combustion chamber carbon which it seems to be effect at. My gallons last several years too.