This is a serious mower suitable for a largeish lawn. You need to be aware it is very heavy to lift in and out of a car and takes quite a strong pull to start ( it does not have electric start)
The Hayter Harrier 41 runs on standard unleaded petrol (compatible with both E5 and E10 fuel). Because it is a 4-stroke engine, you should never mix 2-stroke oil into the fuel; you add petrol straight to the fuel tank and check your SAE 30 engine oil separately.