Changing oil and coolant amount by console command

So, first thing first. When I execute dump(powertrain) I see that (sorry for screenshot, don't know how to copy text from console) oilMass is set to 3.48.

When I look at vehicle engine .jbeam file i see that oilVolume is set to 3:

Code:

        //cooling and oil system
        "thermalsEnabled":true,
        "engineBlockMaterial":"iron",
        "oilVolume":3,

And Im unsure why is that. If I asume that 1000ml of oil weights around 850g, then 3.5L of oil should weight around 3kg. But its switched around. 3L (oilVolume) of oil weights 3.5kg (oilMass)? Or Im not getting it right?

Now to the point. Console dump shows a bunch of variables. Some of them I can change by executing:

Code:

powertrain.getDevice("mainEngine").thermals.headGasketBlown = true
powertrain.getDevice("mainEngine").thermals.pistonRingsDamaged = true
powertrain.getDevice("mainEngine").thermals.connectingRodBearingsDamaged = true
powertrain.getDevice("mainEngine").thermals.exhaustTemperature = 500
powertrain.getDevice("mainEngine").thermals.coolantTemperature = 130
powertrain.getDevice("mainEngine").thermals.engineBlockTemperature = 130
powertrain.getDevice("mainEngine").thermals.cylinderWallTemperature = 130
powertrain.getDevice("mainEngine").thermals.oilTemperature = 130
powertrain.getDevice("mainEngine").friction = 50
powertrain.getDevice("mainEngine"):enable()
powertrain.getDevice("mainEngine"):disable()

And so on. An it works like a charm. But when i try to change oilMass or coolantMass in the same way nothing happens. No errors.

 

Ok so I found how the volume vs mass is calculated in combustionEngineThermals.lua, function initThermals. Initial value in liters is taken from vehicle engine jbeam data and placed into (table?) variable in kilograms:

Code:

fluidReservoirs.oil.currentMass = (jbeamData.oilVolume or 5) * 0.87

And this SHOULD be corect, oil.Volume 3L * 0.87 should be calculated into oil.Mass 2.61kg. But the game somehow calculates it as oil.Volume 3L / 0.87 = oil.Mass 3.48. The other way around. It then displays it in both console an the engine thermal debug UI app, and probably uses the wrong number for calculations.

Then after all calculations are done, it is written to the engineThermalData.oilMass which is accessible by powertrain.getDevice("mainEngine").thermals.oilMass, but the code does not read from it for calculations in the next loop. When I hardcoded it to be 0, it displayed 0 in game, but it wasn't using it for any calculations and car engine was working like normal. So inputting new number into above by console probably works, but its pointless because it immediately gets overwritten with new calculated value stored in fluidReservoirs.oil.currentMass, and this is the thing I should change.

If I add a function inside combustionEngineThermals.lua then I can change it as I want and it gets used in all calculations and works like it should. But I have no clue how to do it from console command without modifying core files.

And if I set it to 1kg, it sets it to 1kg without the liters-to-kilograms error. It displays it correctly in console and apps. This means the "3.48" error is not only a display error but its somewhere in the code, but again, piece of code quoted above seems ok.

OK nevermind about the mass vs volume calculation. I was looking at the wrong engine. As it happens the engine I was using had exactly 4L which gave 3.48kg. 4L*0.87 gives 3.48 and 3L/0.87 gives close enough to 3.48. What a coincidence...