It's probably a cheap synthetic hydrocarbon metal conditioner. There are many credible resources online that describe the effect metal conditioners have in filling microscopically pitted metal surfaces to create a stronger, more polished surface that is really just a hydrocarbon film. Synthetic metal conditioners have been used by the military for preventative weapon maintenance (i.e., swab some down your rifle barrel every 1000 rounds). A popular synthetic hydrocarbon metal conditioner brand is Militec 1. This product is regarded as the top-performer and costs about 18 bucks for a small 4 ounce bottle. If I was going to pour any synthetic hydrocarbons into my oil tank I would first check to see if the chemical composition of the particular brand I was using was compatible with the seals in the engine. Otherwise, the engine may run smoother and burn slightly less oil for a few years and then take a turn for the worst as the seals and gaskets deteriorate. Other than this concern, if the car is burning a copious amount of oil, this also means you will be burning the hydrocarbon conditioner. See if this new product of combustion is compatible with your catalytic converter. If not, all this really means is that you may need to remove your cat which is only a problem if you have car inspections in your county.
Enjoy and think about how you're going to need to pour a couple hundred bucks worth of the real hydrocarbon conditioner into your engine every other oil change or so and then evaluate whether or not it is just cheaper to pour in a quart of oil now and again for all that it burns and then when the engine dies, throw the car away and buy a new one for $6000 since that is about what you can get a really decent used cadillac for on the market. Shh, don't tell all the people about to dump 18 grand on a new 80hp Civic!