I was going to disagree but decided to check your link first. Thinking that the link went to an incorrect page, I went to their website. Your link does go to their "NEW" break-in recommendations, but if you go to the "Product Catalog" and at the bottom, "Engine Assembly and Break-In", it still says 400mi as shown below but removed the 30 days and only changing the filter.
"A high Zinc and Phosphorus formula in an SAE 10W-40
viscosity that is well suited for classic muscle cars, European
sports cars and motorcycle engines. Ideal for flat tappet or
roller valve trains, as well as Ethanol-blended, pure Methanol
and oxygenated race fuels. Provides excellent ring sealing
and does not require additional ZDDP additives. Good for
full power pulls on the dyno, one night of racing or up to 400
miles on the street."
Their recommended break-in procedure for years, and what I tell my customers was do a normal break-in, change the filter and top off the oil and then run the break-in oil for UP to 400mi or no longer that 30 days due to the lack of detergents and flash rusting protection. Thei marketing department must have decided on a higher revenue approach by saying to change oil and filter, replacing with NEW break-in oil for 300mi, then change oil and filter again going with HR oil. More products sold, more profits. I still recommend to my customers what I have always said; change filter, top off, and run up to 400 mi or 30 days.
