uhh, light oil such as ny oil and the like are not a good choice for lubing a lens helical. unless you want it to turn really really easily.
clean everything out with lighter fluid, that dissolves the old grease. once dryand clean, use grease, not oil. I have some Lithium grease I used on my Kiev 4's helical, it's probably too loose for your liking, the Kiev is supposed to be nice ans loose, most lenses are 'stiff' to some degree.
you may have to try various types (densities?) of grease to get a 'feel' that is to your liking.
and WD-40 works well as a light oil/camera lubricant... if you seperate it. spray some in a jar, you'll see little specks of stuff (apparently parrafin) that settle. pick up the liquid with some tweezers, a little goes a long way.
and this is PROVEN, I ressurected a Kiev-4 with WD-40 in the above manner.
good luck!