That is correct. As far as I'm tracking standard windshield wiper fluid is 30% meth, 70% distilled water with some soapy "stuff" in it. The meth for the engine is 70% meth, 30% distilled water and no soapy "stuff" in it. It dries fast and is a little streaky, but works in a pinch.
'13 35i M-Sport X3 | JB4 Stage 1 | BMS Intake | H&R Springs | Gloss black grill | CF Wrap and Coded by me | Recaro Child Seats
'15 M3 DCT AW/SO | JB Stage 1 | RKP Diffuser | P3 | M Perf Spoiler | iND Exterior Trim | Recaro Child Seat