Niteblues wrote:what Lokiboy said...
Mr Wazzock wrote:You guys seem to have lower octanes than we do (UK) - our "regular" is 95 and "premium" (labelled as "super" or "ultimate") is 97 - dealer advised me to use the 97, "makes it a bit smoother and a bit more power", well possibly but is a very subtle difference.
stagewex wrote:Same here, 91.
It'll run on basically anything but as mentioned sometimes diesels when shut-off using 87. Some popping too.
She knows what she wants and so do I.
harryball wrote:I have the definitive answer... What it runs best on. Octane is about more than compression and air-cooled engines can run hot.
As an experiment, I put 87 octane in my wife's rig but did not tell her. She told me something was wrong with her rig. It was popping too much and when she shut it off, it dieseled. I returned her to 91 octane and later tried the same trick with 89. She didn't complain but the rig did take up the habit of a short pop occasionally after shutdown. On 91 it never does that.
My tourist, on the other hand, will fart and pop on 87 but runs fine on 89.
However, both rigs do best on ethanol free 90.
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