Thanks to both, just feeling a bit frustrated was hoping to have a stretch with no repairs at this stage and the oil leak was not pleasant to find.
Rather anxious now to inspect. Fearing what I may find.
Carpets
TLDR:
Purple Power.
Since the carpets were so heavily stained (primarily with oil) and their overall poor condition after a quick vacuum I went straight to soaking them for twenty minutes in a solution of Purple Power.
Using a fingernail style brush I gave them a good scrubbing. Rinsed and repeated. That alone made them 80% to where they are now. But the chemicals + soot wear + and father time left an end result that was somewhat blotchy and uneven in color.
I then gave them both a light coat with vinyl/fabric paint- brushing again in between each coat. While the color is not exactly correct the overall uniformity is much improved. And cost next to nothing and let me keep some original parts a bit longer.