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WHAT HAPPENS TO A CAR AT −51°C - The Car Mods Are Really Interesting - They forgot the motor and gear oils...
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Veröffentlicht auf 02 Aug 2026 / Im
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I go ask LOTS of questions about all sorts of things to all sorts of people... including what motor and gear oils are good for minus 70*C.....
You can hear him talking about how hard the gear changes are getting - the colder it gets - because "Geman" typical temperatures are WAY warmer than Bum Fuck Siberia -50*C temperatures.....
So the colder the gear box gets, the thicker the oil gets, the less it splashes and pumps around and the less all the gears and bearings get lubricated... and so on and so forth.... Untill the gear oil is like molassas from the freezer....
It's also why they tend to leave their engines running all the time.... Soon as the engine gets cold enough, all the oil in it will lock the engine solid like glue... So unless they want to spend ages thawing out their engines for regular daily driving... they leave them running....
Very cold gear oil = Very Bad and Gear Box damage.
https://en.wikipedia.org/wiki/Gear_oil
https://en.wikipedia.org/wiki/Motor_oil
https://en.wikipedia.org/wiki/Tribology
https://en.wikipedia.org/wiki/Winter_diesel_fuel
Etc.
gear oil -70*C
Operating mechanical machinery at -70°C requires highly specialized, arctic-grade synthetic lubricants, as standard automotive and industrial gear oils freeze or solidify long before reaching this temperature.
Why Standard Gear Oils Fail - Pour Point Limitations:
Even premium fully synthetic automotive gear oils (like a 75W-90) usually have a minimum pour point between -45°C and -55°C.Channeling: Below these temperatures, standard oils turn into a solid gel. The gears will cut a channel through the frozen grease, leaving the moving metal components completely dry and starved of lubrication.
Recommended Arctic Gear Oil TypesTo maintain fluidity and protection at -70°C, you must use gear lubricants formulated with 100% Polyalphaolefin (PAO) base oils or specialized synthetic esters combined with extreme-low-temperature pour-point depressants.You should look specifically for fluids classified as Arctic Multi-Purpose Gear Lubricants, which typically meet rigorous military specifications:MIL-PRF-10924 (Grease, Automotive and Artillery: Arctic): Designed specifically for smooth mechanical operation from -54°C down to -73°C.MIL-PRF-2105E / MIL-L-2105D (Sub-Zero Grades): Look for highly specialized military-grade synthetic gear oils designed for extreme sub-zero environments, which maintain a low kinematic viscosity even during extreme cold-start situations.
Key Commercial Product Examples
When sourcing these lubricants, look for industrial extreme-low-temperature lines. Prominent options include:Mobil SHC Arctic Series: Specialized synthetic lubricants designed to handle extreme sub-zero industrial applications.Klüber Lubrication (Klübersynth Series): Their specialized arctic lines are engineered specifically for extreme sub-zero wind turbine gearboxes and aerospace applications.
Aeroshell Grease 22 or 33: While technical greases rather than free-flowing gear oils, these microgel/synthetic hydrocarbon lubricants are rated for operation down to -73°C in aviation components.Essential Specifications to CheckBefore purchasing, verify the product's official Technical Data Sheet (TDS) for:
Pour Point: Must explicitly state a pour point of -70°C or lower.Brookfield Viscosity:
Ensure the low-temperature viscosity (typically measured at -40°C or lower) allows the equipment to start up without overloading the drive motor.