Amsoil Signature 5w-20 + K&N Gold oil filter (HP1017 for 4th gens, not sure about 5th) is arguably the single best combo if you can afford the oil. Your lobes will thank you.
In the end, I did some research and found that it takes 4 qts to do a spill and fill, which is THE preferred maintenance procedure, at 60k miles/100k Kms, from Subaru. I then contacted AMSOIL directly, who said not only is their CVT fluid compatible with all CVTs, from 1 to 3 and HT, it was also Warranty Secured, both Manufacturer and Aftermarket. So, I did it myself. Took about an hour and used 4 quarts. I bought a $10 transfer pump. The warm-up/top-up procedure is easy peasy. And if I can do it, anyone can!
The first thing I did was change the oil using a wix filter and Amsoil signature series 5w30. The verdict is that the oil has plenty of life left and could have easily run longer.
Amsoil W20 I got a 5.7 it’s been great to me
Amsoil Signature Series 0w40 is an outstanding oil I run it with the SRT filter.
I am a big fan of amsoil. I purchased a used F150 in 2012 . It had 80,000 miles. The first thing I did was I changed the engine oil, tyranny fluid, and front and rear end lubs to Amsoil. It now has 242,000 miles and just keeps on running.
I have used Amsoil for years and I change my oil every 15,000 to 20,000 miles.
Amsoil 5w-40 in my 3.6 Corrado that gets pushed hard to redline often and has seen somewhat high oil temps when driving harder. I use liqui moly 5w-40 in my 3.6 CC and 3.0T Q7.
I used Amsoil 5w40 European Car formula or Gulf 5w40 Formula G in my A6 previously. Technically Amsoil doesn't have the have the VW 502 00, 505 00 certifications so I think I will start using Gulf Formula G or GX exclusively in my R, either the 5w40 or 5w30 grade.
I have used Amsoil, but I feel as if my motor makes a funny noise with that in it.
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