Most people here replace all of their coolant with straight Engine Ice.... that's what I've been running for 4 months now with zero issues.

 

Coolant



As I have looked into the cooling issue in general and coolant in particular, I dare to disagree with this statement. Besides, when changing over to EI it is mandatory to replace ALL of the coolant and even to flush the system with distilled water where you might want to add a little white vinegar in older systems to clean out any deposits of calcium.
I think most Duke 390 owners/riders still run the OEM coolant or in case this is/was replaced it was done by the Motorex coolant at a dealer.
Here in Asia, I have tried to get a hold off EI for a number of years now without success due to money transfer issues, dealers/distributors that are no longer and EI HQ USA not responding to emails.
There is even a discussion going that EI is less efficient in distributing engine heat and possibly creates "heat pockets" near the aluminium cylinder parts that are less favorable.
As far as I know, the OEM coolant is Motorex coolant here in Asia.
Other coolant products to consider are the waterless ones and these don't build up the pressure inside the cooling system and claim to be "better" protect the aluminium of your engine. (Evens & XF2).
There are only a small number of Duke/RC 390 riders on this forum.

 

Just a thought, anyone here experience with OAT type antifreeze/coolant?, seems to me a bit like engine ice that has been mentioned on here

 

The manual specifies Motorex G48. The 'G48' refers to Glysantin.. a hybrid coolant additive made by BASF.

Penrite 7 year/450,000km green coolant contains Glysantin G48 & is a lot cheaper than Motorex. Other coolant brands might also use Glysantin G48 so do your research & you might find an equivalent.

 

Hi, looked into G48, and note it contains Silicates, according to the Duke 17 repair manual, coolant must Silicate free
Trevor

 

Somebody has to say it so it might as well be me. Is a quadmire four quagmires side by side? ;-)

 

Hi Trev,

You are correct... the 2017 Manual specifies 'silicate-free' & suggests Motorex M3.0. My 2014 Manual suggests Motorex G48 which is NOT silicate-free.

Looks like KTM changed the spec !

Put simply, a silicate-free coolant (like Motorex 3.0) is OAT (Organic Acid Technology) whereas coolants with silicates (like Motorex 5.0, Penrite G48 etc.) are HOAT (Hybrid Organic Acid Technology). Silicate is added to to the HOAT coolant to improve corrosion prevention on Aluminium but has been accused of causing accelerated water pump seal & hose failure. Maybe there has been problems with such things so KTM have revised the coolant spec to allow for it.

There are plenty of coolants around that will meet the same std's as the Motorex 3.0. Penrite 7 year, 450,000km Blue or Nulon Red Long-Life are just a couple.

 

Hi, Also correct Mariner, Penrite came back to me with 7 Year 450,000KM Blue Coolant Concentrate is a GENUINE GLYSANTIN G30 Original Equipment Manufacturer (OEM), Fully Licensed and Warranty Approved, Type "A" Ethylene glycol, Anti-Freeze Anti-Boil as used in initial manufacturer factory fills. It uses a technically advanced OAT (Organic Acid Technology) based inhibitor system that is Silicate, Phosphate, Amine, Borate and Nitrite free. The extended long life inhibitor formulation prevents rust, corrosion, cavitation and degradation of the cooling system. Which is also HOAT, I'll get prices here in NZ to see how they compared...should of added Motorex M3 is HOAT, because it still has Ethylene glycol in it, where as OAT type 2 is Organic only, Honda red type 2 is OAT too, a marvelous subject this...
Trevor

 

Hi Trev,

Interesting... sure is. Confusing... sure is The datasheet for M3.0 from Motorex states it's OAT, not HOAT. My understanding (and I have been wrong before) is that Ethylene Glycol does not automatically mean a coolant is HOAT. Likewise, OAT can be either Ethylene Glycol or Propylene Glycol.

 

Test done, but no Aussie pick up the phone regarding the software installed, any way, fan on 95°c and off 91°c hopefully more answers once my dealer speaks to KTM Aussie