Who joined me today with changing the oil on one or all o their vehicles? My 1989 4Runner was changed to a mix of 5w-30 and 10w-30 Valvoline Maxlife with an oversize Napa Gold oil filter. I had several quarts of Maxlife sitting around so I purchased two more quarts of 5w-30 to clean off the shelf. I had lost track of when the last oil change was, but I'm fairly certain that it was last March. Considering that I filled it up today for the first time since September, miles on the oil isn't an issue. My plan is 5,000 miles or 6 months (the likely scenario). My 2004 Sequoia was changed to 5w-30 Mobil 1 Extended Performance. My previous OCI was just under 11,000 miles on 0w-30 Castrol Syntec (German Formula) with an oversize Mobil 1 oil filter. My plan is for 7,500 miles or 6 months.