CRC MSDS here; looks like mostly methanol + hexane:CRC Industries Automotive Air Flow Sensor Cleaner, 11 Wt Oz&Type=MSDS&Format=PDF&Filename=5110.pdf&URL=http://www.crcindustries.com/faxdocs/msds/5110.pdf. Meth. is your std. gas line cleaner for ever, so any meth. should work to clean the whole induction sys.