What are the effects of not changing engine oil on a car?

2 Answers
MacLydia
07/29/25 4:07am
The effects of not changing engine oil on a car include: 1. Damage to the engine; 2. Clogging the filter holes of the filter paper, severely affecting the oil's flow capacity; 3. Inhibiting the performance of the oil's lubrication, cooling, and other functions. Engine oil, motor oil, or engine lubricant is a substance enhanced with additives in base oil, primarily containing anti-wear additives, detergents, dispersants, and multi-grade oil viscosity index improvers. The main functions of engine oil are to reduce friction and wear on moving parts, remove sludge (one of the functions of dispersants) and varnish (detergents) from the engine, neutralize acids produced from fuel and lubricant oxidation (detergents), improve the sealing of piston rings, and cool the engine by carrying away heat from moving parts.
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VanEverett
08/12/25 7:52am
Not changing your car's oil is no small matter. I remember when I was driving that old clunker, I got too busy and forgot to change the oil. The engine started making this rattling noise, and when I finally took it in for a check, the parts inside were severely worn. After the oil dried up, sludge built up and clogged the pipes, causing the engine to overheat and nearly seize. The repair cost me thousands—all the money I thought I saved on maintenance went right back into it. If you don't address it in time, the engine's efficiency drops, and fuel consumption increases, costing you several extra cents per kilometer. I recommend changing the oil at least every 5,000 kilometers—don’t be lazy like I was. If you ruin the engine’s lifespan, replacing the whole thing is way more expensive.
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