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by yason
2311 days ago
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I can see this in my car. If the engine isn't warmed up, pulling into traffic often meant it would stall right in the middle of the lane I'm trying to cross, leaving me vulnerable to being rammed. Sounds like your car is broken if that really happens. A functioning car engine won't stall when pulling into traffic because of cold oil. Surely it will just wear out horribly and its lifespan will shorten to a fraction if you do that regularly but today's oils still work pretty good when cold and there will be some circulation to prevent pistons from grinding themselves stuck or bearings from mushing themselves into powder. I could imagine you could get your engine stuck for real in very cold weather if you cold-start the car and floor it right away before there really is any practical oil circulation at all. Even if you really try this it's still more likely you'll wear out bearings first and get served a knocking engine rather than a stall or stuck pistons. But your wording by "often meant" suggests that this stall would happen regularly if you did it with a cold engine so unless you live right next to a highway on-ramp your car probably had something else broken, causing it to stall. |
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It has higher viscosity, meaning it takes more energy to move it out of the way. As it warms up, its lubricating power decreases, but not too much, and its viscosity decreases, enabling better engine efficency. A cold engine is less efficient, but only for a short time, until it heats up.
Oil too thick to pump rarely happens in normal life. In arctic and subarctic conditions people use electric heaters to keep the oil thin enough to pump.