1988 Mk7 LSC. My fuel gauge has been a problem so I keep the tank filled. Recently I take a 300 mile round trip every week, over the mountains, filling it before I leave. At 20 MPG, the car's range should be around 400 miles, but I stop for gas and fill it on the return trip, just to be sure. One time I didn't stop, and made it home alright. Then something weird happened. I was carrying extra cargo, and running fast up the hills. On a steep incline it sputtered, slowed, and felt just like it's out of gas. I carry a 2 1/2 gallon spare tank. I pulled over. Car is idling at the side of a quiet road. I get the spare tank out of the trunk. Standing out there, I hear like a whining or grinding coming from the back of the car. I start to pour gas into the tank, and the whine stops. It's the fuel pump? It's running dry? Cutting to the chase, I find someone willing to give me 5 gallons of gas at a tiny town general store... nice people! I drove a good 40 miles of steep mountain (12 MPG) on that 5 gallons plus my 2 1/2 gallons. Here's the kicker. I filled it up today. Today, there should be about 4 or 5 gallons left in the tank. I should be able to put over 15 gallons into my tank. But it doesn't accept that much. It's filled after 10 gallons. The 22 gallon tank had maybe 10 gallons already in it. According to that, I didn't run out of gas in the mountains. Can the fuel pump run dry when climbing hills? Do they get old and tired?