To the original question, I concur with the no damage done. I'm guessing we all have done it, or close to it. Indicated 70 for me a couple of times. As I don't ride highways that often, or exceed 70 when I do, I was just going with the flow.
Although I was with a crew the other day at almost WOT, now that was flow !
To the hi-jacker, my very trusted mechanic dropped Amsoil after a few years, as it has it's own issues. Always recognize that due to it's multi-tiered marketing, there are alot of promoters out there, selling the kool-aide. I use the Mobil1 Racing4T, over the last 8,000 miles.
BTW, same mechanic related a number of years ago the Michelin's seem to be prone to sidewall blow-outs, more so than other brands. Seems that everytime I hear a friend talk about a "tire blew-up", Bingo !!
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