Dunno who Ed Peters is, but to use engine oil in the NV-T350 transaxle, even if it is a synthetic blend, is foolish, unless you're using the car for demolition derby competition. I checked the MSDS for Mobil 1 "High Mileage" engine oil, and the rating is only API SL, or CF for Diesel.

I recently replaced the transaxle lubricant in my '96 Eclipse GS with Walmart's Supertech ATF+4 and it's a marvelous improvement, even with now 175,000 miles. And you can't beat the price.