Originally Posted By: Vern_in_IL
Just make a lower concentration and test the freeze point. Coolants have anti corrosion additives, to protect metals and seals, water pump and head gasket, and they are using less capacity and higher volume through engines these days.
The concentration of anti corrosion additives is what I'm concerned with. Lower concentration usually means a shorter life, too low and there maybe a lack of protection at any life.
Originally Posted By: kschachn
Originally Posted By: supercity
Most coolants seem designed to be used at 50/50 these days. How effective are they (any?) at lower concentration? For a road/track car rather than use an inhibitor only, I'd prefer to run a glycol coolant at lower conc, maybe 25%. Any recommendations?
Your track lets you use glycol in any concentration?
Yes, for what I do it has never been an issue.