A little story. Last July I went to change oil in Caravan and I swore I had enough oil. I drained oil out then went for my oil and realized that I only had I 5qt jug of Valvoline Advance 5w20 but I still wasn't concerned as I could use that then go to store for the other qt when done. I opened the container then realized that the seal was broke so looked and sure enough only 4 qts. Since I only put 3k that year on Shell gas truck 0w20, I strained the oil and used 2 qts of oil. I got busy and forgot about changing the oil out as Wife was ill. Fast forward 5k later and 8 months oil is still full and clean. The oil change reminder is at 35% so I bought 6 qts, however with wife is in hospice I might not get to it before the year is up. Would you worry about it? I bought the stash in 2018 after I bought van so oil in engine was purchased 6 years ago. I was thinking of going to the year or light, however I hate to do anything as I can get that call everyone dreads at anytime.