MyOil.ie
HomePricesPlan ahead
NewsGuidesContact
MyOil.ie

Your home's oil, sorted, compare local prices, get drop alerts, and never get caught short.

An independent heating-oil assistant for Ireland.

A free service by Magnus Monitors

Tools

  • Home
  • Compare prices
  • Plan ahead
  • Run-out predictor
  • Price-drop alerts

Learn

  • News
  • Guides
  • How it works

Company

  • About
  • Contact us
  • Privacy
  • Terms

Counties

  • Heating oil Cork
  • Heating oil Galway
  • Heating oil Mayo
  • Heating oil Donegal
  • Heating oil Kerry
  • Heating oil Wexford
  • Heating oil Tipperary
  • All 26 counties →

© 2026 MyOil.ie. Prices are indicative and may vary, always confirm with the supplier.

Heating safety: when in doubt, contact an OFTEC-registered technician.

← All guides
Saving money4 min read

300 vs 500 vs 1000 litres: how much oil should I order?

Bigger fills are cheaper per litre, but cash flow and tank size matter. Here's how to choose.

By MyOil Team · 2 June 2026

Cheaper by the litre, bigger by the bill

The more you order, the lower the price per litre, a 1000 L fill almost always beats two 500 L fills. But many households deliberately buy smaller amounts to manage cash flow, and that's a perfectly valid choice.

Rules of thumb

  • 1000 L, best value if you have the tank space and the budget.
  • 500 L, the common minimum order and a sensible middle ground.
  • 300 L, fine for spreading cost, but watch the per-litre premium and delivery minimums.

Compare the actual € price for each volume on your county page before deciding.

ShareXFacebookLinkedInWhatsApp
Stay ahead

Catch the dips, not the spikes

Set a price-drop alert and we'll email you when oil gets cheaper in your county.

Set a price-drop alert →
Plan ahead

Not sure if you need oil yet?

Pop in your tank and last fill, and we'll estimate how many days you've got left.

See when you'll run out →

Related guides

Prices5 min read

When is the best time to buy heating oil in Ireland?

Prices swing with global crude, the euro, and the seasons. Here's how to think about timing without trying to predict the future.

Read →
Running out4 min read

How long will 500 litres of heating oil last?

A simple, honest guide to estimating how many weeks 500 litres will heat your home, and why the answer changes with the weather.

Read →
Running out5 min read

What to do if you run out of heating oil

Running dry is stressful but recoverable. Here's how to get heat back safely and avoid it happening again.

Read →
Your personal heating-oil assistant

Never overpay, never run dry.

Tell us your county and we'll watch the price by the fill, not the cent. Add your tank and we'll tell you when you'll run out, and nudge you in good time to order.

Set a price-drop alert →See when I'll run out