Open the owners manual that came with your car and read. It is listed there.
The type of oil used in a 2011 and 2012 Toyota Sienna is the synthetic 0W-20.
5w30
Bottom of the engine on the oil pan.
5 qt
My 2005 Sienna XLE Limited takes 5 quarts with filter change.
4.9 quarts
For a 2004 Toyota Sienna the van takes exactly 4.5 Liters. Make sure you add a bit of oil to the new filter and oil the seal around the oil filter before placing back on engine. I own the LE version but they all have the same V6 3.3 Liter engine by Lexus.
The 2007 Toyota Sienna engine oil capacity is for quarts. The manufacturer recommends that you never overfill the engine oil.
What type of oil should be used for a 2003 Toyota sienna xle
5 30w of any kind of oil you like. This is from my 2001 Toyota Sienna Le manual book
It's a good possibility that the old oil was never drained, then the new oil added. Now there is way too much oil in the engine causing the sputter.
5W-30 is on the cap of my 2006 Sienna Limited