Not a fan of adding anything to oil. Oil has base stocks and various additives such as Friction Modifiers, Anti-Wear, Extreme Pressure, Viscostity Index Improvers...etc. The oil is a balanced mixed chemistry.
Adding something to an oil is 1) going to/ may cause additive clash 2) mess up the oil chemistry.
Then there is the fact DuPont specifically says to NOT use Teflon in motors. Refuses to sell it to folks that wanted to, some folks "obtained" teflon from other sources put into aftermarket oil stuff, and lawsuits ensued. FTC got involved and many of the 'Oil Add" stuff were sued for false advertising - pulled off the market.
Some companies ( or the name only) are back out there with " new and most wonderfullest chemistries" * Caveat Emptor*
Filter by Wix, Havoline / Chevron has great basetocks and add packages. Pennzoil or Castrol GTX works well too, depends on region and availablity.
Read the manual for specs for your temp range for oil weight [ 5w-30, 10w-30...]
Replace the PCV with factory - second choice is NAPA replacement. Never get a cheap PCV valve.
Don't overfill.
I just assisted with a classmates - AC Delco Fitler $2.69, Gallon jug of Havoline 5w-30 for $5.98 and one quart for $1.58. Hers takes 4.5 quart with the filter. Advance Auto carries the Havoline, and takes old oil. Autozone next door to them has the AC Delco OEM filters. NAPA was not on her/ our route or we would have bought the better Wix filter.
I figure being Oct, come January be time do change again. Lots of stop and go, short trips for her. Winter time and start up wear, fuel dilution...won't have the miles, better to change out the contaiminants early. For <$12 , why not? Cheaper than what some damages that can occur can cost.
Yeah I did the hard part. I put the PCV valve in [ OEM AC Delco] handed her wrenches, paper towels, oil filter and suggested she get back down and get the other jean pocket stained with oil to match the left one.
I put in the 1/2 quart of oil and let her pour in from the jug the othr 4 quarts...I did hold the funnel for her...being a gentleman and all.
While she was cleaning up the driveway, I drove onto a brick in a clean area of driveway and made sure drain plug snug , filter snug. I even let her buy me a hamburger after all was done and let her turn in the used oil.
And you folks thought I was not a nice guy....