Have done over 100 miles now using Miller's Running in Oil and just wondering when I should be changing it. I started driving it nicely but could not resist the temptation to start having a blast.

I know it syas on the bottle that its recommended between 500 and 1000 miles but think this may be too much as its smoking and needs properly setup again. I figure the smoking is due to the running in oil and hopefully not the engine itself, fingers crossed.