Here's something I posted a while ago: 427Z06 said: "I have to say I'm stumped with all the complaints of "excessive engine noise". I even tried measuring it with a sound level meter sensitive to 0.1 dB and have yet to measure anything." I agree- this "noisy M1" thing has me stumped, and makes me wonder if people are just jumping on the bandwagon because they expect the noise after reading threads here and are then overly sensitive to the noise when they use M1. I have a challenge for those of you who get defensive when questions like this are raised: SOMEONE PLEASE record your vehicle's engine noise in the same environment, same placement of microphone, etc. with M1 and with whatever oil you think makes your engine quieter. Then post links to some sound samples. I would LOVE to hear the difference, if there is any. The way people describe the "horrible noise" from M1 vs. the "smooth, quiet" operation of other oils, surely this great difference in engine noise must be something that will come through on these recordings. (I'm an M1 0W-40 user, just as quiet as everything else I've tried-- PP, Quaker State Synth, Havoline, Mobil Drive Clean, GC, etc. all in various viscosities)... Who will be first? The more samples from people, the better. Something tells me we will get few to no takers on this... Not surprisingly, I got ZERO takers. After dozens upon dozens of people posting about how horribly loud the valve train noise was using M1 and then how much it quieted down when using other oils, NOT ONE PERSON posted an audio recording to prove their point. Hopefully putting this in its own thread will encourage those people to come forward. One request: NO EXCUSES, just recordings, please. I'd like to keep this thread on-topic, so either STEP FORWARD and offer to do a test, or please DO NOT REPLY.