However, as a general guideline, for most 2004 Dodge Caravan engines, a 5W-30 oil is a common and often recommended viscosity. Whether you choose conventional, synthetic blend, or full synthetic is up to you and your budget. Full synthetic offers better performance and longevity, but costs more. Conventional is the most affordable option. Synthetic blend falls in between.
Before you buy oil, double-check your owner's manual. This is the most reliable source for this information. Ignoring the manufacturer's recommendations could harm your engine.