Yes, it’s important to let your engine cool before adding oil. When the engine is hot, the oil expands and can give a misleading reading on the dipstick, leading to overfilling or incorrect levels. Additionally, adding oil to a hot engine can cause the oil to burn off quickly, potentially damaging the engine. Allowing the engine to cool for at least 30 minutes ensures that the oil settles and gives a more accurate measurement. This practice also helps avoid burns or injuries from contact with hot engine parts. Therefore, to ensure accurate oil levels and safe handling, it’s best to check and add oil when the engine is cool.