Since the weather has warmed up I've made my annual switch to B100 sold locally because it's 40 cents cheaper per gallon. I have about 20 gallons of unfiltered WMO that I've saved from my last few oil changes. Some of the oil is rotella blend 5w-40 and some is mobil 1 5-40 full synthetic and some is non-synthetic.
I have an in line spin on baldwin filter I added to my fuel system, how much should I filter the oil before I put it in my tank?
I'd probably only add 10% WMO at most, I'm in no real rush to burn it especially if it puts my engine at higher risk of failure.