Questions about Motul's MoCool

[inquirer]

1. Reading the technical datasheet of the product I read that it "Can be mixed with most coolants monoethyleneglycol based". Is it safe to be mixed with Petronas Paraflu Up which in its technical datasheet states: "Formulated with Mono-Ethylene Glycol enhanced with a special Organic Acid salts inhibitor (OAT Technology), free of nitrites, borates, phosphates, silicates and amines, it provides excellent protection against overheating, frost and corrosion and aversive agent (bitrex)" or should I search for additional data in order to ensure they are compatible?
2. MoCool should be mixed with distillate water at 5% according to the datasheet: "MOTUL MoCool is a concentrated cooling fluid that may be mixed with distillate water for immediate use as a coolant.To be mixed with water at 5 % (20:1)". My question is at what percentage should I add it to a mix of coolant with water? Is a 50% DI water % - 45% Paraflu Up - 5% MoCool mixture a good ratio or does the 5% MoCool does not apply when added to mixtures that contain other coolants?

 

[Boomer]

Why are you using this stuff??

 

[inquirer]

Why are you using this stuff??

I'm not. I plan to use it in a vehicle that mostly drives in the city traffic and as a result its cooling system most of the time works at its limits.

I just would like to see if it is going to make any difference.

 

[Rand]

IMO city traffic works the cooling fan to its limits.. not the cooling system.
I would pass and just use the OEM antifreeze
With your climate you could mix it 30% coolant to 70% water for additional heat transfer but you do lower the boiling point a few degrees that way.

 

[inquirer]

IMO city traffic works the cooling fan to its limits.. not the cooling system.
I would pass and just use the OEM antifreeze
With your climate you could mix it 30% coolant to 70% water for additional heat transfer but you do lower the boiling point a few degrees that way.

I guess both work at their limit. The coolant repeatedly reaches the temperature that activates the fans and that cycle keeps repeating itself.

 

[Rand]

I guess both work at their limit. The coolant repeatedly reaches the temperature that activates the fans and that cycle keeps repeating itself.

but the engine isnt producing much heat... the cooling system is working as designed.

If I park my car in parking lot with engine running it will do the same as yours does. This doesnt indicate "working the cooling system at its limit"

autocross racing etc produces WAY more heat load vs plodding along in traffic.

 

[inquirer]

but the engine isnt producing much heat... the cooling system is working as designed.

If I park my car in parking lot with engine running it will do the same as yours does. This doesnt indicate "working the cooling system at its limit"

autocross racing etc produces WAY more heat load vs plodding along in traffic.

I'm not sure that racing really does that. Maybe if we are talking about tight courses with no straights. But what I have experienced is that motorway driving, even at high speeds / revs does not activate the fan. The airflow keeps the engine cool enough and it does not reach the fan's activation point.

 

[Rand]

So you are saying that idling in a parking lot is harder service than Racing?

 

[inquirer]

So you are saying that idling in a parking lot is harder service than Racing?

I don't know for idling specifically, but driving in the city, driving regularly in traffic jams, with 1st and 2nd gears for a considerable percentage of the car's life, is harder for parts as the radiator and the cooling system's hoses.

Driving constantly at high revs or accelerating hard is harsher for the engine, not for the cooling system. In that cases the airflow is very high and the coolant does not reach the thermostat's limits.