Sure, but the 3dB rule is made for a noisy work place like a factory or a mine site. From the link given above they say:Humans might sense the difference more depending on the source. A car engine will be hard to measure with any background noise that is usually present. However if those same decibel reductions are applied to something like a air conditioner or other appliances then it could be more noticeable since they are indoors.
Please show me your papers that show the effect does not exist.shannows “paper” is a single grainy table referencing obviously dated oil weights with zero methodology or treatment information. Further, it literally omits nearly HALF of its follow up data.
The second paper is specifically testing an experimental oil with novel properties and it even references little to no dB variation amongst off the shelf oils, even of differing weights.
I’m not going to expend any further energy trying to explain (again) why your statement on “real, measurable, Perceptible, and reproducible“ is completely incorrect. It’s a poor appeal to authority and fallacious on its face (in addition to being completely wrong). If you choose to remain ignorant of fundamental testing principles and statistical analysis that’s your business.
I’m still waiting for yours that show the effect does exist.Please show me your papers that show the effect does not exist.
But we have two (or one if you prefer) publications that show the effect is measurable because they give actual dB measurements that show a change. This means it does exist.I’m still waiting for yours that show the effect does exist.
What we have is an impass - you wish to ignore any sound scientific explanation regarding the subject and I no longer care to bother to explain.
Have a nice day.
We need a DOHC with long chains formula ! My pushrod V8 is the quietest engine I have …In my F150 w/5.0 the engine makes less noise with mobil 1 truck and suv oil than regular mobil 1. Formulation has something to do with it for sure.
The human ear (healthy) can sense a 1dB change and 3 dB change is usually fairly apparent. The problem of course with anyone saying they can “tell the difference” is that there simply isn’t a direct reference. You aren’t hearing oil x and then an immediate comparison to oil y. Beyond that - ambient noises can change drastically as well - as sources as innocuous as a garage door opening down the street or a car driving a street over can affect the receptors perception of sound. Using this report - a change between 20 and 30 wt oils gave approximately 1dB of change. Oils of similar weights likely have LESS difference. So we are talking about the very bottom end of what humans can discern and then NOT talking about every other variable in our uncontrolled garage or driveway or whatever.
Simply put - you aren’t hearing a difference between oils. You can’t control the ambient sounds and you don’t have a direct comparison. If there is a difference it likely isn’t discernible by the human ear. And certainly not discernible (at best) 20-30 minutes later in a completely uncontrolled scenario (assuming an oil change).
I’m tired of this nonsense.
Edit: if you’ve actually ever taken noise readings you will know that they aren’t a static number - they have lots of variability. Beyond that, even the distance between you and the source (by as little as a foot) can affect your perceived noise level. Not to mention the hundred other things that can skew noise levels or your perception of them. If a certain oil makes you FEEL better then use it - but trying to stretch this study into some sort of cudgel for your superhuman ears argument is asinine.
Until using QSUD and QSGB a few times, i never 'thought' there was a sound difference. Royal Purple has also been one of the quietest oils i've used.
Adding to my previous post:Funny that this oil vs engine noise came up. I have run my '08 RAV4 V-6 on 5W30 Amalie for the last 3 years since that's what the shop I use has. The engine has always had a tiny bit of start up noise for just a second or two. I'm tuned to my car so I hear it, others might not.
After the last oil & filter change the cold start was quiet, notably quiet. Was I losing it? Nope, further cold starts were the same. The new owners of the shop had changed to Chevron Supreme which they put in my car. I don't know if it's the synth blend or not but will find out when the weather & roads clear up here. The price was the same as dino Amalie, no upcharge. This proved to me without a doubt that a different oil can make an audible difference. Prior to this I always thought that was pure crappola. I was wrong.