Floor pan under carpet covered in oil

[stove]

Hey guys, 

I was about to run some fuel pump wiring and came across this. There is oil covering the entire floor under the carpet and it goes all the way to the back seats. Strange part is the firewall is completely dry, it is only on the floor pan. It’s as if someone has deliberately covered the floor with oil, has anyone seen something like this before? 

[GTSBoy]

A master cylinder used to be leaking.

[stove]

3 hours ago, GTSBoy said:

A master cylinder used to be leaking.

That was my first thought but it’s definatly oil and it’s on the passenger side floor aswell 

[The Bogan]

I've not put a lid on a oil bottle properly and when it fell over in the boot it "rust proofed" the boot with a heap of oil, maybe something like that.

[Rusty Nuts]

A previous owner decided to rustproof with deoderized fish oil, maybe??

[xcess]

21 hours ago, Rusty Nuts said:

A previous owner decided to rustproof with deoderized fish oil, maybe??

I’ve seen this before... looks exactly like these photos