2020 Elite | Platinum White Pearl | J35Y6
Dipstick? I wish... as @CroMath already stated, what you had mentioned does not apply to the 2018+ Odys. Like yourself I've owned Honda/Acura for several decades and have only seen them get dumber.Many of us here have been using Valvoline MaxLife Synthetic transmission fluid in Honda transmissions with very good results. It costs $18 + tax for a gallon from Walmart. A drain and fill uses a little less than a gallon in the Honda 6 speed. Amsoil is mentioned here occasionally, but because of their recommendation on engine oil change mileage years ago, which damaged my friend's engine (he was selling Amsoil products at the time), I don't use their products.
MaxLife is synthetic. The Honda transmission fluids (Z-1 and DW-1) are not. In simple terms, synthetic oils withstand about 20 degrees higher in-service temperature resistance than mineral base oils, and offer better viscosity stability.
If you change your own oil, a drain and fill is just about as easy as an oil change. The hard part is getting the fluid level correct. Here's how - warm the vehicle by driving a few miles. Shut off the engine, then within 60-90 seconds, read the dipstick.
Also, I've been using Amsoil for decades and never had an issue. It clearly outperforms other popular motor oils as there are a few here, along with myself that have actually validated this for ourselves by sending in samples. Nothing new... Very old news.
With that said, I've seen vehicles go the interval that Amsoil is good for with zero issues. Your friend may have had other issues going on there...
I usually don't go to the edge on the interval with Amsoil and treat it like regular synthetic oil, because that's just my preference.
The fact of the matter is, you could use pretty much any oil and as long as you keep it maintained with oil+filter changes and proper maintenance, you'll be fine. Of course some oils are clearly better than others, but if you're not keeping the rig until the wheels fall off, who cares? Most people either trade in or sell their cars in a few years max.. For the life longers, use the good stuff. Simple.
Mainstream oil wise, from my own testing and other validations from other fellow owners, Pennzoil Ultra Platinum is my go to. Excellent oil...