Like Zee09 said, if you want to keep using the oil you are using maybe back off the OCI, maybe keep it at 5000 miles and get a UOA to look at TBN or fuel dilution. I do not have a GDI Engine, but if you are having fuel dilution issues you may need to see if a different oil, meaning Amsoil SS versus Amsoil XL, which you are using will make a difference.
I’ve tried several different oils in my B58 and there’s definitely more than a placebo or it’s being cold effect. Adding liquid moly MoS2 to my 227k mile pickup took all of five minutes to notice and that was at temp when I poured it in. Switching to Red Line from QS Euro after only 3k miles made my b58 quieter and after about half a tank of driving with Motorkote in it it sounds and acts completely different than it did on the stock 0w20 it came with. Went from sounding like a small tractor to just humming along.
You think he’s wrong and unless he can prove it to you by going through the pains of getting recordings he can’t be correct? Ears are data.
That’s nowhere near close to reality. Out of all the senses, sound perception is one of the most nebulous. It’s very, very difficult to obtain accurate sound pressure measurements even in a proper lab. Throw a human in the mix and it’s exponentially more subjective.
XL is rated for 20k miles, DI or not 8k is nowhere near what the oil is rated for. SS won't silence the engine noise either at that same mileage.
Feel free to list your test results and
You can't hear a difference sometimes? You can't feel any difference sometimes?
Is that it.
I’d say that’s unlikely with that oil. More like fuel dilution given your description of the operating conditions.
No doubt. I’m sure in your neck of the woods you deal with the same thing. I’m just waiting till the weather warms to get some new oil in and I’ll run it the whole summer. I probably should have used something cheaper for a winter run.
