The name is misleading, it doesn't contain zinc, I believe it's POE's (someone feel free to correct me).Zn additive didn't show up in the UOA?
Zn did not skew results. I would stick with this OCI & oil and be done with it, towing or not.Zn additive didn't show up in the UOA?
Thanks, I was thinking of trying ST for my next oil change to save a few dollars. Hoping the results are the same.Zn did not skew results. I would stick with this OCI & oil and be done with it, towing or not.
Ypu have a perfect match and a happy medium.
Clearly the copper is from break in. This is not a disaster movie.
Nothing wrong with trying something different. You could always experiment with a different oil or go thicker.Thanks, I was thinking of trying ST for my next oil change to save a few dollars. Hoping the results are the same.
But then again why mess with something that's working, right?
^^I would do this.go thicker.
POE could liberate varnish with a few PPM of contamination …The name is misleading, it doesn't contain zinc, I believe it's POE's (someone feel free to correct me).
Betya the copper is from Hy-Per Lube, or at least not from bearings.
Valvoline alone should give confidence.
I initially thought that too but figured I would run a few UOA to see any trend.That copper would scare me. I'd think after 32,000 miles the engine would be long broken in.
We love it, ticks all the boxes for us. Even though we had a new transmission under warranty it's been a great vehicle, lots of room!How do you like the Ascent? Wife and I went to look at one but the local Subaru store only had about 10 cars in total, with zero Ascents.
Good idea, I didn't even think about the additive causing issues (or at least raising the copper) with the oil cooler. I stopped using the additive on the fill-up after the UOA was taken.None of this should be "break in" wear at this stage with 28K miles at the beginning of this OCI.
I would run a mixture of 2 qts Subaru Genuine 0W20 and the balance the Subaru 5W30. That is also a very high moly
oil. NO additives! Don't fret the cost, its equal to a couple of gallons of gasoline. And run the oil the full interval.
The copper is from corrosion of heat exchanger due to the oil formulation with the additive.
5 ozPOE could liberate varnish with a few PPM of contamination …
How much was put in ?
I would probably step up to 5w30 if I was towing in the summer.
I'd like to see the viscosity closer to 9cst.. that 7.13cst is going to be extra thin in a 260hp 2.4L turbo Gdi that is towing up a hill.
the only reason they recommend 0w20 is fuel economy. I'd be ok with losing .25mpg.
In the winter and not towing the 0w20 is probably ok.. but I'm not sure about this recent trend of thin in reasonably high HP turbo motors.
Didn't Subarus of recent past always use 5W-40? There was a popular HDEO everyone in the Subaru community was using a few years back.
Unless you have a Subaru with one of the last EJ series engines that were still being offered in the STi’s when Subaru made the switch to FA and FB engines in everything else.Yes, before Subaru switched to GDI engines SOME of their engines could accept Xw-40 to top off any oil lost due to consumption. You would have to go back at least a decade to find a Subaru engine that had Xw-40 as an acceptable oil to use to fill to capacity per the owners manual.
NOTE
Engine oil viscosity (thickness) affects fuel economy. Oils of lower viscosity provide better fuel economy. However, in hot weather, oil of higher viscosity is required to properly lubricate the engine.
Unless you have a Subaru with one of the last EJ series engines that were still being offered in the STi’s when Subaru made the switch to FA and FB engines in everything else.