[timbo]

Is it the peaking of SweetLightCrude(SLC) oil that is in fact the issue? And does this bring forward the effective date of peaking?

To summarise what I've have read about HeavyCrude(HC), TarSands, Shale Oil and other Non-Conventional(NC) oil.

HC is more expensive to produce and process. So the price of petrol isn't going down.

EROEI on HC is significantly lower than SLC, and on NC its just plain bad.

Lack of current and/or planned infrastructure to handle various contaminants in HC.

Like SLC the major reserves of HC are in geo-politcally unstable areas.

Most of the reserves left are HC because we produced the easy stuff namely SLC first.

Anyway please comment on or add to the list.

[Kingcoal]

I agree wholeheartedly that we've peaked on light sweet. However, we may find more under the poles, etc.

[Cynus]

It's hard to come by statistics for different grades, but from the information that is out there it has become a given that LSC peaked in 2004 - 2005. Whenever you here Saudi Arabia complain of "refinery bottlenecks" what they really mean is that they are running out of LSW and only have sour to offer.