Originally Posted By: JW_Ford
Im "open" to going longer than 5k but was curious as to what other people use for this engine.
7.5k with a good syn is no problem. There area a large number of UOA you can see for this, or do your own and work up to it.
Both my neighbor and I use M1 HM 10w-30 in ours, and for 7.5k OCIs. I have the prior gen V6 in a Lexus and he has the same engine as yours in a Toyota. We are both very technical and researched it exhaustively. Mine now has 250k+ miles on it and runs great, no appreciable oil use (maybe a few ounces; not enough to require make-up oil). Our weather is ideal for 10w-30 year round, but if you don't go below 0F much, 10w vs 5w won't matter. Going to an HM oil for the better add pac and to keep your seals in good shape (why wait until the leak?) would be a good move.
Toyota V6s had some oil issues in the 90s, but that's not germane here.