Reasons... Haha. Anyway thank you, for doing the work, still could be some kind of AI involved which was tinkering with the image. Similar results can be seen on pixel 6 (maybe also other phones), which uses AI for enhacing the taken images.
Meanwhile I'm living in a country where every baby stroller is built like an offroad vehicle cause our sidewalks have more holes in them than levelled pavement. So this would be pretty much unusable.
If you got a very thick oil, yeah a mix of diesel and oil is good so it would lose on viscosity and would be easier to get it on and into the wood. But today's engine oils are not really that thick and can be used without any mixing with oil of lesser viscosity such as diesel. Nowadays you can find those very thick oils mostly in tanks (military vehicles) and big machines not your everyday family car.