Thanks for posting the photos.Dad used conventional 10W30 for annual oil changes. This is the non-supercharged version.
Intervals range between 2-5K, though I think he may have allowed it to go 10K one time?
Mileage is 184K.
View attachment 154662
View attachment 154663
I really like the Toyota Previa - Was Toyota's best made vehicle ever in my opinion. Many owners taking their previa to 300k miles, which is unheard of for any other brand minivan. When I retire, I want to buy some well maintained Toyota's/Honda from the 1980's and 1990's. A 1991-1997 previa, a 1983 to 1988 Toyota Van, a 1984 Honda Accord, a 1990's Acura Legend, and a 1990's Mercedes S600 are in my plan to buy.
Regarding oil change interval, so many posters on BITOG are posting clean engine photo's under the valve cover with conventional oil with <= 5k oil change intervals. It's convinced me that the only thing that matters is how often you change your oil, not what oil you use.