Everyone has an opinion on this stuff and we have all done other stuff with other cars but here is what the manual says. The manual also says that you can use synthetic, so the days of adding synthetic when the rings seat don't apply in this case. I know back in the day, my sister got a brand new 86 Prelude Si. I babied it home from the dealership 20 miles away. Later that day, her boyfriend (now my brother in law) floored it in every gear to redline with 39 miles in it. I was pissed to say the least. Guess what, they sold that car a few years later with 140k on it, no issues.
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