I suspect there are some things that have been lost in the translation.
As others have mentioned, the oil is probably a synthetic (or, more likely, a synthetic blend) oil that is marketed to provide "advanced protection for 7000 miles). Something like this.. Perfectly legit, but perhaps a bit misleading since any modern motor oil should be good for 7000 miles.
The “fuel line degreaser that gets rid of filament that gunks up your motor during the winter” I suspect has been garbled. It’s either fuel line deicer that gets rid of condensation that forms in your tank during the winter or, perhaps, an air intake cleaner that cleans the intake passages of deposits that can form, particularly during winter months both in the intake passages and combustion chambers (both being inside the engine and the deposits in the combustion chamber are deposits resulting from the combustion of the fuel–in a odd way of thinking, shrapnel). Both are bunk, IMO. The deicer is just alcohol, is present at 10% in nearly all gasoline sold today. Adding 12 ounces more per tankful isn’t going to hurt, but won’t help anything. The intake cleaning service is, perhaps, a bit more legit, but is still mostly snake oil. Perhaps it would increase the top speed of the car by 5 mph or cut a tenth of a second in the 0-60 time, but in normal driving it would make no difference.
The big thing is that she is taking interest in maintaining her vehicle. The more she does this, the more she will learn what is important and what is hype.