You will get answers for both premium and regular (unleaded). The manual says something like 92...but that depends on how it's calculated, and it's figured differently in the UK (RON) than here.
The sticker on the inside of my fuel door says unleaded...so that's what she gets...unleaded. I have not driven mine enough yet to experiment with premium to see if pays off with better MPG. At the moment I'm getting a combined of around 17-18 MPG with regular 87 octane (R+M/2) which is equal to about 91-92 (RON) for Europe. That matches what the owners manual says, so I say I'm good.
See here: Octane rating - Wikipedia, the free encyclopedia for more info.
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...But we in it shall be rememberèd;
We few, we happy few, we band of brothers;
For he to-day that sheds his blood with me
Shall be my brother...
1994 RRC LWB, 82k miles, 4.2, Cornish Cream/Lightstone Interior, spring converted.
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