By my user name it is obvious I am a SOPUS oil guy, but I am by no means a basher of any quality oil. When the wife purchased her current 2015 Legacy I decided to use M1 AFE 0w-20. Flash forward to this oil service; she currently has 20K on the car. I decided due to Walmart’s sale price to buy Pennzoil Platinum 0W-20 for this oil change. I know I have continually read about how sometimes M1 is perceived as a “loud” oil. I’ve even chimed in on this in the past with the old butt dynometer. But I’m not really POSITIVE if I have ever experienced an oil being noticeably quieter….. until now.
The 2.5 horizontally opposed 2.5 fb Subaru engine in her car has always been loud when cold. Since changing to Pennzoil this week I cannot believe how much quieter it is with a cold engine. BTW the car has only seen Carquest blue filter (Wix produced before AAP took over Carquest) as I had a stash of them. So I can’t attribute the quietness to that. For some reason her car is legitimately quieter with Pennzoil synthetic.
Now before someone interprets this as a M1 bash. The M1 has been great. We have had no oil consumption with the M1, which is somewhat unusual with the newer Subaru engines. I may go back to M1, especially if the car starts to consume the Pennzoil. But I can honestly say that I have experienced the phenomenon of an oil making an engine quieter.
The 2.5 horizontally opposed 2.5 fb Subaru engine in her car has always been loud when cold. Since changing to Pennzoil this week I cannot believe how much quieter it is with a cold engine. BTW the car has only seen Carquest blue filter (Wix produced before AAP took over Carquest) as I had a stash of them. So I can’t attribute the quietness to that. For some reason her car is legitimately quieter with Pennzoil synthetic.
Now before someone interprets this as a M1 bash. The M1 has been great. We have had no oil consumption with the M1, which is somewhat unusual with the newer Subaru engines. I may go back to M1, especially if the car starts to consume the Pennzoil. But I can honestly say that I have experienced the phenomenon of an oil making an engine quieter.