Originally Posted By: Craig in Canada
Originally Posted By: OldBaldy
Weird...my experience with startup noise in my B6 S4 AUdi V8 is exactly the opposite...the PU is the quietest oil (by far) of those I've used so far...and these V8s are notorious for cam chain clatter at startup.
Just as a point of discussion - the noise I observed with a particular very popular Euro grade syn oil was not startup clatter and it was not knocking. It was threshing machine hash noise at all temps, most prevalent off-idle. GC is much quieter than this oil, but Rotella T is even more so. After my winter OC of GC (last of a stash) is gone I'll be switching to T6 which I also expect to be quieter than GC. I was curious about PU Euro (if it's even available here) as well based on the anecdotal cleanliness stories I've read.
As others have said, with a few great options out there, there is no reason to live with something that's noisy when excellent protection can probably be found from something that isn't (in your particular engine model).
Fair enough. I was actually replying to the OP, who mentioned specifically his startup noise.
If the PU seems to cause more engine noise, despite no indications of issues with UOA, I'd probably also want to change to something that sounds quieter, even without any apparent actual technical need to do so.
As mentioned, I'm happy with the PU in my 4.2L so far, and am pleased to see that not only has it quelled the startup cam chain rattle, but it seems to contain a fair amount of "black" residue in so few miles, as seen on the dipstick. I believe the oil is actually doing some additional cleaning of previous deposits, and so intend to change the oil after only 5K miles instead of the standard 10K OCI on this motor.
Originally Posted By: OldBaldy
Weird...my experience with startup noise in my B6 S4 AUdi V8 is exactly the opposite...the PU is the quietest oil (by far) of those I've used so far...and these V8s are notorious for cam chain clatter at startup.
Just as a point of discussion - the noise I observed with a particular very popular Euro grade syn oil was not startup clatter and it was not knocking. It was threshing machine hash noise at all temps, most prevalent off-idle. GC is much quieter than this oil, but Rotella T is even more so. After my winter OC of GC (last of a stash) is gone I'll be switching to T6 which I also expect to be quieter than GC. I was curious about PU Euro (if it's even available here) as well based on the anecdotal cleanliness stories I've read.
As others have said, with a few great options out there, there is no reason to live with something that's noisy when excellent protection can probably be found from something that isn't (in your particular engine model).
Fair enough. I was actually replying to the OP, who mentioned specifically his startup noise.
If the PU seems to cause more engine noise, despite no indications of issues with UOA, I'd probably also want to change to something that sounds quieter, even without any apparent actual technical need to do so.
As mentioned, I'm happy with the PU in my 4.2L so far, and am pleased to see that not only has it quelled the startup cam chain rattle, but it seems to contain a fair amount of "black" residue in so few miles, as seen on the dipstick. I believe the oil is actually doing some additional cleaning of previous deposits, and so intend to change the oil after only 5K miles instead of the standard 10K OCI on this motor.
