1988 vw cabriolet what kind of oil?

For a 1988 VW Cabriolet, it's recommended to use 10W-40 motor oil, especially if you live in a region with varying temperatures. Look for oil that meets the API (American Petroleum Institute) service classification of SF or higher. If you prefer synthetic oil, a high-quality synthetic 10W-40 can also be suitable. Always check the owner's manual for specific recommendations and guidelines.