have i 1991 740gl wgn automatic 160k no turbo.can some one tell me the miles/galon you get on these cars.when the fuel light comes on i fill up 14 gal and comes on again excactly 260miles.had new plugs and gapped right 2800 old ones still good no carbon deposits,new air filter,measured compression all around 180,changed gas filter,tested o2 sensor ok,changed cat converter because it was clogged,tryed another air flow sensor,cleaned the throtel body,auto trany shifts perfectly.checked for vacumm leaks could not find any.i drive about 50 miles a day mostly highway and aroud 60 to 70 miles/hour.can some one tell me if this is normal or any suggetions.thanks