You
really do not want to use a waterless coolant. Seriously DO NOT use that overpriced, nasty snake oil. The marketing stuff is the dictionary definition of utter BS that completely misses the point about why every car manufacturer in the known universe uses a water based coolant and specifically warns to not exceed more than 55 - 60% antifreeze
Glycols have about half the specific heat capacity of water. It's thermal conductivity is less than half that of water. Compared to water it's useless at removing waste heat.
Plain water obviously has several drawbacks related to freezing point and corrosion hence the usual solution of adding enough glycol to lower the freezing point and some corrosion inhibitors to get the best of both worlds
Boiling point is a red herring and one that the snake oil salesmen have latched onto. Waterpumps creat a pressure head inside the engine as they pump away while the thermostat restricts flow out. Allowing the rest of the system to build pressure raises the boiling point so a hot engine won't puke hot coolant after it's switched off
If an engine gets hot enough to boil the usual 50% coolant mix something is wrong. Stupidly expensive waterless coolant doesn't fix the problem it just masks it while at the same time further reducing the efficiency of the cooling system
Look up the msds for Evans npg+ and you'll find that it's at least 67% ethylene glycol and also contains propylene glycol. It's basically neat glycols + a corrosion inhibitor and priced as though it was gold. Look in the back of an MB owners handbook and it'll state that antifreeze concentration must never exceed 55% because doing so reduces heat transfer
If the stuff was any good why did Cosworth use nothing but plain water + a corrosion inhibitor in their F1 engines?
Inside an F1 Engine - Racecar Engineering
Genuine MB coolant used to be based around Glysantin G05, these days it's G48 for older stuff and/or G40 for newer stuff? G48 is a HOAT coolant with silicates, G40 is a Si-OAT coolant with a slightly longer service life... 5 years vs 3 according to BASF iirc whereas MB used to recommend chagning every 2 years and now that everything is about renting cars/selling finance instead of producing well engineered cars it's 10 or 15 years [/tongue in cheek] All three flavours are available from Comma and various other brands, mix with deionised water (moreso if in a hard water area) and change according to the coolant manufacturers schedule or the origional MB schedule as the long life stuff is more about appealing to renters that bought a service plan
