I will be doing an oil change on my 1997 Oldsmobile 88 with the 3.8 liter engine in a couple of weeks or so and I have decided to try the Lubrimoly with the Pennzoil 5W20 oil as i hope to run this through the winter with a fram ultra filter. I will also be taking one of my biannual 2000 mile round trip as I go to visit my mom in Texas. She is 85 and suffering from dementia, so I try to see her at least twice a year. After many years of monitoring my mileage on this vehicle and on such trips, I want to see the effects on mileage from the addition of lubrimoly if any. Question: Is the fram ultra filter ok to run with additive?