We ran the Cosworth on Redline pure synthetic. At that time, if you called Redline, you got the guy who owned the place on the line.C J Murray wrote:I never use break in oil. I never got that concept. Is break in oil less slippy or more slippy and why?
He was VERY clear; his product was so 'slippery', it would not allow the rings (for instance) to wear the peaks off the honing in the cylinders; you would not get a good ring seal.
He specified 30-40W (single weight, your choice) detergent dino oil for break-in runs on the dyno. As I recall, that was a certain time/varying load/heat procedure. The power pulls were done with Redline.
I assumed he knew far more than me, and that's what I did.