50% regular ol' anti-freeze (Peak, Prestone, whatever) with 50% water.
Fuel tank
The firing order on a rabbit is 1-3-4-2 gas or diesel.
VW will tell you that you must use their specific yellow coolant. You don't. Just use the top of the line Prestone that is for all engine types. Don't add water!! It runs on pure coolant...
The Golf wasn't made until 1985. 1984 was the last year of the Rabbit.
No, but they are quick little cars.
There is no 1991 VW Rabbit.
http://www.pdfee.com/1983-volkswagen-golfrabbit-wiring-diagrams.html
Coolant for a 2006 VW Bettle is put into the coolant overflow tank. As it is needed, the radiator will automatically pull in additional coolant.
Look in your owners manual or call a VW dealer.
The recommended spark plug gap for a 1981 VW Rabbit is .028"
Proprietary Coolant available only from VW repair shops. Never, never use any other type of coolant as it will turn the radiator fluid into jelly and not work. In an emergency, you can add Distilled Water to get to the repair shop. Never, never, never use tap water under any circumstances.
Recommended coolant/ antifreeze for vw, audi, skoda, seat is G12. Very good coolant, helps, lubricates an works as a anti-corrosive serum.