Try telling him that letting the gas tank go more than half empty causes the fuel pump to run hotter, which causes premature failure.
To cool and lubricate the internal components, fuel must flow continuously through the fuel pump. Insufficient flow limits cooling and lubrication of the pump. A leading cause of fuel pump failure is running the fuel tank low. This is particularly critical on late model vehicles without a fuel pressure return system. Running such a vehicle out of fuel once can permanently damage the fuel pump.
http://www.agcoauto.com/content/news/p2_articleid/195
Typically a $500 repair.
Thanks for the information!
I had no idea.
He’s keen on saving money, so this might help.
Thanks, FRiend!
Julie