Who has used gas under 91 octane in their SVX?

- How did it run?

- Was it slower?

- Did it stall?

- Was there a lot of knocking?

- Was it any less smooth?

- Were there any long term effects?

I'm just trying to diagnose a problem listed in a previous thread, but wanted this specific question to have its own topic.

Oh, and which "good gas" do you prefer?

Please note your year and mileage of SVX.

Thanks in advance.