Max wrote;
>>I know these things are flaky, but is that far enough oofto
>>warrant a look at the voltage stabilizer?

The gas gauge on our '85 has worked the same as yours since we have had it (about 10 years).  I have switched the voltage stabilize for a new one but it made no difference.  If I recall there will be other gauges acting up if the stabilizer is bad.  If I drop the tank to change the seals and hoses then I will take the time to check out the sending unit.
George,
'85 Westfalia