that vega story reminded me about the vega my brother owned when he was in high school.
he always carried around a 5 gallon jug of oil in that thing because it used so much oil, and acted the same way when it was down a few quarts.
Yep, Vega's had a three terminal oil pressure switch, and one of the terminals grounded the electric fuel pump. If you didn't have oil pressure, you had a fuel pump that didn't work, so no fuel to the carb. My Vega never let me down, but I did carry a shovel in back cause they could get hung up in snow drifts. In 1974, I sold my daily driver for more than I was asking due to the gas shortage. I never had a gas shortage, cause where I worked we sold Stoddard solvent, which burned just fine when mixed half and half with gasoline, and was even cheaper than gas at the time.