It depends on what kind of shape your engine is in. If your engine leaks go with a 20 40 if your engine doesnt leak go with a 10w 30.
In the oil pan at the bottom of engine
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.
4.2 quarts of any engine oil 10w30 or 10w40 for summer.
two quarts of 75w90 gear oil.
Redline MT-90 75w90 GL-4 or Royal Purple 75w90 max-gear Gl-4
10w30
According to one of Fords websites : For a 1988 Ford Ranger : ( the Motorcraft FL-1-A engine oil filter is used for the 2.0 , 2.3 , and 2.9 engines )
The oil filter may be lose.
4.3 Quarts.
what kind of oil does a automatic '99 hyundai elantra take?
The oil capacity of a 1990 VW Cabriolet is 5 quarts when the filter is changed. The oil and filter should be changed every 3,000 miles or 3 months for maximum longevity.
Motor Oil