The recommendation may vary according to the plug manufacturer. Try the manf. own website (NGK and AC Delco have excellent info, for example) and have your engine type (first three letters usually required) to hand to help your search. If that is no help then I would set at 1mm or 40 thou. (yes, I did mean a really big gap!)
.028 is the spark plug gap.
The spark plug gap on a 1999 VW Passat should be set at .032 inches. New spark plugs are preset, however, and should need no adjustments.
Where is the oil drain plug for 2004 VW Golf
.032
spark plug
Assuming you mean spark plug gap, it varies with type of plug used. Need more info on spark plug used.
The 2004 Viper Yamaha spark plug gap is .018. Most spark plugs will be pre-gapped by the spark plug manufacturer.
what is spark plug for mazda tribute 2004
Spark plug gap according to Champion Spark Plug applications list is .044
The knock sensor on a Passat is located on the side of the engine. It is just below the number two cylinder spark plug.
what is the spark plug gap for a 2004 oldsmobil alero 3.4 eng
The recommended spark plug gap is .044"