95 octane is recommended for e36's I ran mine on 98 for a wile ran smoother but then we got a huge price rise to $2.20 a liter so went back to the 95. But as far as I know all you people up there in the northern hemisphere have superior quality fuel in comparison to us down here in New Zealand. 91 oct burns hotter than the rest and has a less predictable combustion so plugs don’t last as long if not the rite temp rating for that octane fuel . Just for my knowledge , £80 to buy two spark plugs and get them put in is a bit steep isn't it? I don't know what the exchange rate is or what you guy's pay for getting things done over there but its a 15 min job (to do 6 I've done it a few times on mine) , including buying over here id hate to think it would be any more than $60 which is about £20.
Last edited by tommo8ball; 11-22-2008 at 03:17 PM.