Coolant additives to decrease engine temperatures

[Tracked Emira]

It has been very frustrating to think my car is going into limp mode because it is overheating when the outside temperature is over 90 degrees.
Obviously Lotus knows this is an issue, otherwise they wouldn't have recently upgraded the cooling system. I will eventually install JUBU's coolant system unless we can purchase the new system from Lotus.
I can't understand why I never see the temperature reading climb above 200 degrees on a hot day when tracking the car. Please explain because it is impossible for temps to never go above 200 degrees especially when you run more than 8 hard track laps with temps over 90 degrees???
I have been researching different additives and have come down to using either VP cool down and Royal Purple ice coolant to try to reduce engine temperatures.
Anyone try these and have any recommendations?

 

[MapleOreo]

I put in a bottle of water wetter as soon as I got the car.
On "normal" days, it sits at 85 degrees. On super hot days, the highest I've seen it is 89 degrees.

 

[Kaz]

If you have access to an OBD2 reader that gives you live readings you will see the actual temp is different than reported temp on the dash...on mine the OBD2 reading is usually lower for a while, then catches up but remains a little under the dash temp...will keep looking when I get my car back from tuning

 

[Kaz]

Was in the canyons all morning driving hard and OBD2 water temps never went above 170 and was mostly at 165 with ambient temp at 81, the dash was showing a range from 185-198. The car shows 185 fairly quickly even when the OBD2 value is still warming up to 150-ish. The dash is clearly showing a number that "looks" right probably to avoid worrying the driver and causing lots of dealer requests. No idea if the OBD2 reading is accurate vs the dash, but the OBD2 readings are real time and change based on throttle input so i would think just like the artificial power readings that never go above 400hp the dash water temp is same way. Will probably show just a value above 200 when the car is actually very hot (like 220+).

 

[MapleOreo]

185-198 is exactly the range my i4 runs in.

 

[Read T]

Agree that live temp monitoring through the OBD port shows a few degrees cooler. So far, mine has stayed 185-195 in hot humid NC Summer. My Mini cooper from the factory runs at 221-226 which always freaks me out. Additives like water wetter may help, but work best with straight distilled water (but then may provide less corrosion or freezing resistance)