On the parts, my suspicion is cooked, overheated motor oil. Coming from the sky, no idea.
There is no substance in your car that should look like orange sludge. The sludge has to be a foreign material. Try locating the source of the sludge and then work from there.
Yes, stop leak turns into a thick substance to plug any leaks, when it ends up in the overflow bottle it turns into sludge there.
solids like faeces settle at the bottom and are removed with a scraper .This is called sludge
why would you want to? Yes you could, the viscosity will average out .
It depends on you. I personally like Castrol 10W40
sludge cake
a muddy brown sludge
Sludge typically stays in sludge digesters for about 15 to 30 days, depending on the specific operational conditions and the type of digestion process being used (such as anaerobic or aerobic digestion). During this time, the organic materials are broken down by microorganisms, reducing the volume and improving the quality of the sludge. The retention time can vary based on factors like temperature, the composition of the sludge, and the desired level of stabilization.
I like castrol Activo part synthetic
We like Castrol Synthetic blend but now that our montero it is getting up there in miles we use Castrol High Mileage. It really a presonal choice but in test Castrol has done better than alot of other major brands. It lubicates the best and doesn't break down as fast.
I don't know what 'sludge fudge' is but it sounds like chocolate fudge and if it is, then it would would be a sweet food, or candy, or dessert, what ever you prefer.
It may be recovered for use in construction additives and there also applications like fertilizer. Reuse plan is very depending on the availability of such carbonate sludge, concentration and the species of other impurities.