Just keep your ears open when the weather gets warmer. The other risk is that you may not hear preignition at higher RPMS.
I killed my 5.0 V8 with preignition at 6000 RPM. I was running 94 octane with 13.5:1 compression. Collapsed 3 pistons. Didn't hear a thing until I got home and the dipstick was up against the hood and oil down the firewall. Blow-by could suspend a tennis ball.
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