[AdamIsAdam]

Interesting. So if % ash is most important, then Amsoil wins hands down over everyone with specs listed. I'd like to know more about that.

After that, most everything here seems decent, depending on application. For me, the VR1 looks ok for my use. I did just send an email to Valvoline asking about the additives for my 1,500 mile per year, 1x oil change per year, flat tappet hi-po engine. I'll report back what they say.

For me this oil seems to leak the least out of my rear main seal. I tried a fully synthetic (maybe Mobil 1 or Amsoil, I forget) and it definetely started leaking more. I know, I know, that's not supposed to be the case, but it was.

So now I'm just paranoid about additives, or the lack thereof.

Question: if I'm only doing 1,500 miles/year, without track time, is it best to change the oil before or after the winter. I do drive it year round, but only rarely during the winter. And always driven for at least 10-20 miles to really warm things up. No driveway idling queen here.