Quote:
Originally Posted by upallnight
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Second line in that article:
"Fuel pumps are either cooled by the gas around them
or by the gas that is flowing through them."
It goes on to elaborate that running the pump dry is the major offense, not running the tank low.
Even CR, which I don't hold a lot of weight to when it comes to autos says, "The gasoline acts like a coolant for the electric fuel-pump motor, so when you run very low, this allows the pump to suck in air, which creates heat and can cause the fuel pump to wear prematurely and potentially fail."
This also says that dry running is what
could kill the pump.
I'm not trying to convince anyone to do one thing or the other. Just stating my opinion that running from full to empty is
probably not what killed a pump. Mileage/age is. If we were seeing pumps fail at 50,000 miles... I'd be inclined to possibly look into it further. But the only pumps I've seen fail have been well over 100,000 miles. Unless referring to the HPFP found in the certain variants of the e90/92 where there was a known early failure problem with them when they switched to direct injection.