I had a full bottle of new semi synthetic castrol magnatec and a half full bottle of coolant sitting behind the sway bar in the boot.
In order to stop them for moving I thought it would be a great idea to secure them with a spare car battery that I hadn't had the chance of chucking into a neighbors bin yet.
So long story short there was all those liquids over the boot, under the rear seats and a small pool in the rear foot well. The worst part is that the seats are made of foam

THIS ISN'T THE POINT OF THE THREAD.
There was a high pitch whine coming from my exhaust that I took as an exhaust leak. After I removed the back seats to clean the said oil it became louder and I realised it was coming from the fuel tank cover. I have come to the conclusion that my unsmooth revs and high pitch whine are the result of a failing fuel pump. I've had the habit of running the tank down to empty before refueling (#studentlyf) and I read this is bad for these fuel pumps.