If you can go with IAME’s recommendation for oil and ratio it’s one less variable to have to worry about on the days you’re scratching your head, trying to figure out why things are not quite running 100%.
Generally it’s not worth the effort experimenting with oils in my experience. From what I’m reading in this topic, If you’re moving from Shell M, might as well go with HTX 909 or Wladoil and drive with 100% confidence and go have some fun.
That’s a bold statement I’m pretty sure not sure is not correct. Please edit or redact it unless you have something to support it.