Amplifier maintenance for beginners

No, I'm the one who should be apologizing! If you're using synthetic, 6000 miles is quite conscientous.

I must admit being more than a bit lax on checking my tire pressure, though. Especially, with the weather changes we have here in the spring. I just kind of blissfully kept listening...

Come on, Snofun3! Are you trying to get this guy a repair bill? You need to change the oil in your amp much more frequently than every 6K miles. Sheesh...