The surviving sepsis guidelines, maligned as they are, are quite clear: You start resuscitation on a patient with a 30cc/kg bolus.
Patient weighs 100kg and is getting admitted for sepsis? You start with three liters. Not 500cc. Not one liter. Three liters. Obviously bad CHF and ESRD are exceptions, but otherwise, don't pussyfoot around. There's lots of conditions other than sepsis where that applies as well. DKAers often need 6+ liters to get close to hydrated (though if you slam it all in at once in a young patient you risk cerebral edema, better to space out a bit). Pancreatitis patients also commonly need that much or more with how much they're third-spacing due to the acute inflammation.
Of course, if you ask Marik we're committing "iatrogenic salt-water drowning". But under-resuscitation is a much worse crime than over-resuscitation IMO, and if you're paying attention to the fluid responsiveness of your patient, continuing the fluids is almost certainly more helpful than not.