Fluids never go to a scrap yard, and they must come out before anything else does. Used engine oil goes back to a retailer or a municipal collection point, both of which usually take it free. Refrigerant must be recovered by a certified technician. Old petrol is treated as household hazardous waste. Every one of these has a lawful free or low-cost route, and pouring any of them away is an offence.
This matters to scrappers more than to most people, because the fluid is standing between you and the metal.
What comes out first, and where it goes
| Engine oil | Coolant and brake fluid | Petrol and diesel | Refrigerant | |
|---|---|---|---|---|
| Measurement | Route and typical cost | Same | Same | Same |
| Where it goes | Auto parts retailer or municipal centre | Municipal hazardous waste | Household hazardous waste | Certified technician |
| Typical cost | Usually free within a quantity limit | Usually free | Usually free | You pay, or the retailer includes it |
| Container | Sealed, clean, original if possible | Sealed and labelled | Approved fuel container only | Not applicable |
| The rule that catches people | Mixing anything into it makes it hazardous waste | Never mix with oil | Never in a plastic bottle | Venting is an offence |
The single most important line there is the first one about mixing. Used oil on its own is a recyclable commodity that gets re-refined; used oil with petrol, solvent, brake fluid or antifreeze in it is hazardous waste, and the collection point that would have taken it free will refuse it.
Used oil is a commodity, not a waste
Re-refining used oil back into base oil takes far less energy than refining crude, which is why retailers accept it without charging: it has value to somebody downstream.
Drain it warm so it flows, into a clean sealed container, and keep the filter separately since most collection points take those too. Do not use a container that previously held anything else, because that is how a free drop-off becomes a contaminated one.
Old fuel
Petrol degrades over months rather than years and eventually will not run an engine cleanly. It is not something to pour out, burn or put in a bin.
Household hazardous waste collection is the route, in an approved fuel container rather than a water bottle or milk jug. Some fire departments and municipal facilities accept it directly; a call establishes it faster than a search.
Refrigerant
Fridges, freezers, air conditioners, dehumidifiers and vehicle air conditioning all contain refrigerant that must be recovered by a certified technician before disposal. Venting it is an offence and yards refuse untagged units.
The practical routes are the retailer recovering it on delivery of a replacement, a licensed appliance recycler, or paying a technician. Our page on recycling appliances covers the values that follow once it is done.
Why this sits on a scrap price site
Because fluid handling is what stands between a vehicle or an appliance and its metal value, and getting it wrong costs more than the metal is worth.
A yard will not take a fluid-filled engine, a wet transmission or an untagged cooling appliance. A licensed dismantler has interceptors and drainage designed for exactly this, which is why handing a whole car to one is often the sensible route even at a lower headline price. The full vehicle sequence is in how to scrap a car.
Common mistakes
- Mixing petrol, solvent or antifreeze into used oil, which turns a free drop-off into hazardous waste.
- Storing old fuel in a plastic drinks bottle.
- Draining fluids onto the ground or into a drain, which is an environmental offence everywhere we cover.
- Cutting refrigerant lines on an appliance or a vehicle.
- Taking a fluid-filled engine or gearbox to a yard.
- Assuming a container is empty because it looks empty.
The recycling hub sets out the five streams and where every other category belongs.
Frequently asked questions
Where can I dispose of used motor oil?
Most auto parts retailers and municipal recycling centres accept it free within a quantity limit, because used oil is re-refined into base oil and has value downstream. Take it in a clean sealed container and keep the filter separate.
Can I mix used oil with other fluids?
No, and this is the mistake that costs money. Used oil on its own is a recyclable commodity. Mixed with petrol, solvent, brake fluid or antifreeze it becomes hazardous waste, and the collection point that would have taken it free will refuse it.
How do I get rid of old petrol?
Through household hazardous waste collection, in an approved fuel container rather than a drinks bottle. Some fire departments and municipal facilities accept it directly. Never pour it away, burn it or put it in a bin.
Do I need a technician for refrigerant?
Yes. Refrigerant in fridges, freezers, air conditioners and vehicle systems must be recovered by a certified technician before disposal, and venting it is an offence. Yards refuse cooling appliances without evidence that it has been done.
Will a scrap yard take an engine with oil in it?
No. Yards refuse fluid-filled engines and gearboxes because they have nowhere to put the oil. Drain them first, or hand the whole vehicle to a licensed dismantler with proper interceptors and accept the lower headline price.