Sounds like a bad-taste niche marketing ploy from the manufacturer that takes advantage of an actual historic incident.

The concept of ignorance of the culture and unintended consequences is taught in US PSYOPS and Information Operations courses. The Sepoy Mutiny is one of those studies.

It would not be in the US's long term best interest to claim to use "pork oil". It is however, in the short term interest of the company to enhance sales.

http://abcnews.go.com/International/story?id=80075&page=1

"
To load the new rifle, soldiers had to first bite off the end of the cartridge. The cartridge was well greased — with a combination of beef and pork fat.
"It was offensive to both Hindus and Muslims," said Barbara Ramusack, head of the history department at the University of Cincinnati.

For Muslim sepoys — the term for a native soldier — serving in the British army, pork was unclean, forbidden by the Koran. The Hindus held the cow to be sacred, and saw anything that would entail tasting beef fat product as an attempt to break their caste.
To them, it was "ritual defilement," Ramusack said. "You had to bite off the end of the cartridge, and then it would bring pollution into your body."
The manufacturers of the rifle had no idea that their product would, with one fell swoop, offend followers of the two dominant religions on the Indian subcontinent. They also had no way of knowing that many Indians thought this was part of a British plot to destroy their faith — just as some Muslims today see some aspects of Western culture as a threat to Islam.