The recommended oil type for a 2001 Jeep Grand Cherokee depends heavily on the engine it has. There were several engine options available that year. To know for sure, you
must check your owner's manual. The manual will specify the correct oil weight (like 5W-30, 10W-30, etc.) and the type (conventional, synthetic blend, or full synthetic).
However, generally speaking, many 2001 Jeep Grand Cherokees used 5W-30. But again, do not rely on this. Using the wrong oil can seriously damage your engine. Consult your owner's manual or the sticker under the hood for the definitive answer.
