Here are some of the potential issues that you may experience if you put 5w20 oil in a car that takes 5w30:
* Increased engine wear: The 5w20 oil is thinner than the 5w30 oil, so it may not provide as much protection against engine wear. This is especially true if you drive in hot or dusty conditions.
* Oil breakdown: The 5w20 oil may not be able to withstand the higher temperatures of the engine, which could cause the oil to break down and lose its effectiveness. This can lead to engine damage.
* Engine sludge: Using the wrong type of oil can cause engine sludge to form. Engine sludge is a thick, black substance that can clog up the engine's oil passages and restrict oil flow. This can lead to engine damage.
* Engine deposits: Using the wrong type of oil can also cause engine deposits to form. Engine deposits are hard, crusty substances that can build up on the engine's pistons, valves, and other components. This can reduce engine performance and efficiency.
If you have accidentally put 5w20 oil in a car that takes 5w30, you should change the oil as soon as possible. This will help to prevent any potential problems.