91 Octane For A 318IS??

[Den]

http://www.dragstuff.com/techarticles/how-to-read-plugs.htmll
The link didn't work, but I'll check the spark plugs, thanks.

".htmll" is a typo. Try this:
http://www.dragstuff.com/techarticle...ead-plugs.html

Techron is the shiznit.
BG-44k is s'posed to be good too, but it seems to be more pricey and harder to find.
http://www.bgprod.com/bgconsumer/bgservices/44k.html

I think Redline SI-1 is pretty good too. $6 at Pep Boys.

http://www.redlineoil.com/products_fueladditives.asp

[pig4bill]

Don't sweat it. I can easily hear mine when it pings. When I bought mine new, the dealer recommended 87 Chevron because it contained more Techroline. I never got pinging until 40-50k miles or in hot weather.

[demlotcrew]

Here in the Uk i use 98 and we also have 102.

The lowest is 95.

[Rob]

but I thought european countries used a different type of rating, ie XXoctane in UK does not equal XX in the US

[demlotcrew]

Im not sure not that TBH.

[nando]

they aren't comparable, they're just different scales of the same thing.

more than you ever wanted to know:

http://www.btinternet.com/~madmole/Reference/RONMONPON.html

[demlotcrew]

Will have a read thanks

Andrew

[arnoldgtr]

Use the Techron. You can buy it a Wal Mart or Auto Zone. It's identical to the stuff sold at BMW dealers. I use a bottle every 5K miles to keep everything cleaned up.