Home Depot sells "Turbo Washer Fluid", consists of 49% Meth/51% H2o, $2.99 for 3.78L jug, no mixing required.![]()
That's the stuff I use now. I share my washer fluid reservoir with the meth system so I get more than 4L capacity and can still wash my windows. 4L lasts me from Vancouver to Kamloops with heavy use on the big hills. I use about $70 in diesel and $3 in washer fluid so I'm not too worried about the cost of consumables. Even if you do mix your own 50/50, 4L of methyl hydrate (methanol) is $10 so a mixed jug would be $5. Again, the added cost is negligible. If I cared about that I'd ease off on my right foot a little and get better mileage.
I think my system was around $400? Can't remember and don't feel like looking it up any more. Basic Snow Stage 1 Diesel system bought through PDR.