Georgecls said:... The combination of the increased cetane (delayed ignition) and burn modification combine to increase the power of the combustion cycle and also increases fuel efficiency.
While I'll tend to agree with this statement, there's still more to the noise thing than just fuel. The cetane booster that I used on the last tank DID improve my fuel economy, so I know that it does help.
But, here at work, our Dmax gets fueled with WHATEVER is on the road or close. They don't stop at truck stops, they just get diesel whereever they can. There's NO possible way that the quality of the fuel in our work trucks is anywhere close to anything acceptable.
I however, ALWAYS buy my fuel from the local truck stop. I DO get better fuel economy with this fuel, so I know that it's of better quality than buying it just anywhere.
Even with the "good/better" fuel that I'm putting in my truck, my truck is STILL signifigantly louder than the ones here at work. There just seems to be a wide range of noise that comes from these engines, and I can't believe that it's all fuel related.
PS: I do NOT have Juice or any box. I'm totally stock, and so are the work trucks.