Buying oil

[jbird]

how would 10w-40 full synthetic nulon fare in an S with 105,000km? too heavy, given winters coming, or fine?

10W-40 should be fine as long as the oil meets the API standards SG, SH or SJ.
edit: "Meets the current API Standards. Edge is rated at SM which is the current standard.

i read through this whole post. can some1 tell me how often you'd need to change the castol edge 05W30 oil and how much it costs etc thanks

You change it every 6 months or every 10,000kms. You can change it at 5000kms if your anal but I personally believe quality synthetic oils can be used for longer, and its a waste of money changing so often. Change the filter every 2nd oil change. Obviously if you drive the car hard all the time or go to the track alot I would be changing it more dependant on those factors.

Check your oil level every 1000kms or so as most S2000s tend to burn oil, the level should not dip below the L mark on the dipstick.

I use Edge 5W-30 and I buy it on sale for around $40 for 5L.