what oil is best for my high mileage 1995 honda passport?

Motor oil: You want "best" so I will give you best, but that equals most expensive. Motor oil: Castrol Edge or Mobil1, or any full synthetic, I'd use sae 15/40 ~~~~~Transmission: Honda Genuine DW-1 Transmission Fluid ...Honda part number 343167. Power steering: Dexron III ATF.~~~~~~ Brake fluid is all the same. DOT3.

With these high quality products and other care your Honda has a lot of life left. Personally I use Castrol Edge, about $30 for a 5 quart jug. About $7 a quart if you buy the smaller quart bottles, worth every dime...to me anyway. There are guys here smarter than I am and insist conventional petroleum is as good, this is not a fact it's going to make your engine last longer, it's my opinion