Engine oil Shell or OEM Subaru

I am using 15W40 Shell Oil for the last 8 years. No issues. 160k Kms on the Odometer

I have always used shell 10w-40 and did regular oil changes around 4-4.5k. Faced no issues what so ever, engine was still healthy, no oil consumption, almost same performance.

Doesn\u2019t hurt so why not. I feel like that\u2019s the main answer and what pushes me to do it.

I bought a new limited, last week. I did my first oil change yesterday and the amount of shit in it was crazy. Definitely do it.

I run rotella T6 5w-40. Have for 120k miles and will for the next 120k

I had a 2017 Forester with 175k miles on it and only used factor oil and never had any issues. I did not do any off road stuff and it was only a premium model, not a wilderness model. I don’t think it matters as long as you change it regularly.

I've been running cheap Rotella T6 for 20 years with modified STIs, zero issues.

I use Rotella T4 on my 2.5L and have been for years because high ZDDP helps with the valve tapping I have going on. It has actually gotten quieter over time and feel the engine is running smoother than ever.

Rotella T6 5w40 in my EJ255, its helped a tad with the leaking until I can get everything apart to seal it all up again.

A mi shell no me resulto buena.