Ok this may be a coincidence or not I'll let you be the judge. In my younger years while still in HS and college most of my hunting, except the times I went up to our cabin on state forest property, was done on public or coal company ground. This was close to highways and town. For about 5-6 years during this time I worked at a gas station in the summers and on weekends. I would be changing oil, greasing cars, packing bearing, etc and pumping gas. The smell of these petroleum products we all know is hard to eliminate. And this was long before scent eliminating products were developed. But IMO the deer were used to this odor and I do believe it covered up or masked my human scent because as I recall I saw a lot of deer and filled all my tags during that time frame. And a several were within a few yards of me.
Oh yeah - I forgot to mention that I also smoked then too.