Engine needed rebuilt in 30,000 because of the oil sludge which I change the oil every 3,000 miles or 3 months I sold it in 2000 and I bought the 97 previa LE supercharged with 40,000 miles on it now it has 90,000 with no problems just oil change Go with the Previa not the sienna.
Unfortunatley the Previa is no longer available except on the used market. They stopped making them when the Sienna came out, but don't ever be fooled that the Sienna is a replacement for the Previa or in any way equal to it. The Previas are one of the "good ol days" Toyotas before they began cheapening their product to make them more affordable for american buyers.