* 5W-30: This is the most common and likely recommendation for most 2002 Neon engines.
* Oil type: The manual will also specify whether to use conventional, synthetic blend, or fully synthetic oil. Again, check your owner's manual.
Never guess. Using the wrong oil can severely damage your engine. The owner's manual will tell you exactly what viscosity and type of oil your specific Neon requires. If you don't have the manual, you can usually find a digital copy online through Dodge's website or a reliable automotive resource site.