Most folks that use diesel (mixed with corn) are doing so in an effort to discourage raccoons and other animals (deer, crows, etc) from consuming the corn before the hogs can get to it. Hogs will readily eat the corn despite the diesel smell.
Some folks will argue that there are environmental issues involved in using diesel…but that is another subject.
Certainly…there is benefit in using different types of “scents” to attract hogs to an area. Anything from “Sow in heat” scents to general attractants (Black Gold)…are used with varying degrees of success.
Personally, rather than just making a food source available.... I try to make the entire area as enticing as possible. One such way to do that... is to provide “rubbing posts”.
Hogs love to rub on anything (telephone pole, fence posts) that has creosote on it. It is just another way (other than wallowing) they rid themselves of parasites. Creosote (coal tar) is no longer sold to the general public…but you can still purchase creosote dip.
http://stores.godwinsoutdoorinc.com/Detail.bok?no=222
This can be mixed with water and sprayed or sponged onto trees, posts, etc… an ounce or two will make 3-4 gallons of solution.
Naturally, this needs to be applied in areas that hogs feel comfortable visiting/lounging (I.E. not in the middle of a bald open field).
Here is an example of a pine tree I treated recently:
The same tree just a couple of days later:
The same tree about 10 days later (bark rubbed smooth):
The Kreso-D imparts a very strong creosote smell that is carried by the wind over long distances. Don’t get any on yourself….you will smell for a week.
Anyway, this is just another method to attract and hold hogs in an area.