A quarter tank is the point many drivers treat as "time to fill up", and it's a good habit. It leaves room for a closed exit, a traffic jam or a detour. It keeps the in-tank pump from running in a near-empty tank. And on a road trip it lets you pick a station instead of taking whatever comes next.
Road trips
Look up your car's highway range on its year page, then plan stops at roughly three-quarters of it. In rural stretches with long gaps between towns, fill up whenever you get the chance.
Storing a car
If a car, motorcycle or mower is going to sit for months, a full tank with fuel stabilizer added keeps the gas fresher than a half-empty one. Dose the stabilizer for your tank size.
