My car sat for 2 years before I got it, and boy, did that do damage. Killed the original fuel pump @ 188,000 miles, clogged the Walbro pump/filter at 197,000 miles, clogged the Aristo pump/filter filter @ 207,000 miles.
My car crapped out last Sunday, finally was able to pull the gas tank down yesterday.
The gas on the LEFT is what came out of the tank, the very top 3/4 gallons. The gas on the RIGHT is what came out after dropping two bags of glass marbles in the tank and shaking it.
Car feels so. much. better now!