I put Valvoline Premium Blue in the RV, but then the pandemic exploded so I might end up never really using that oil. Since it's gonna be sitting in the motor for 7-8 months (I changed it in Feb) including the hot 100+ degree humid summer, so it's gonna probably degrade some and need to be replaced before I hit the road again, hopefully this September or October. I might leave the filter and it's contents since it won't be dirty and it might not have moisture in it, unlike oil in the crankcase that has more air exposure. That'll save about a quart of oil and not waste the new FL1995.