My mom's impreza will loose oil between oil changes with 0w-20 and will be fine with 5w-30. It burns the thinner oil.
My wife\u2019s 2012 Impreza is at 195k miles and I switched it to 0w-30 and then 5w-30 due to oil consumption. Was burning a quart every 1K miles on 0w-20, burns half that on 5w-30. I\u2019m actually considering going thicker.
The dealership here itself was using 5w-30 as the default for oil changes even though 0w-20 is stamped on the filler cap. After checking myself that Subaru said that would be OK, I started using it too for my own changes just to avoid flipping back and forth -- though I have no idea if that would be a problem. In any case, the Forester seems happy, even if the mileage may have dipped slightly.
Engine does become a bit quieter with 5w-30.
Prolube is trash used motul and my top speed increased by almost 10 on all gears on my d250
I've been running 8100 Power 5w30 for the last two changes, every 3000 miles, and the aced the initial Blackstone test.
I've been using the x-clean EFE every 3k miles forever now an am tuned on full e85 now for 30k miles besides the factory valve tube seal leaking they fixed at 14k miles once but that's due to 23' errors. Now am thinking did I use the wrong one hahaha but am 30k miles deep in my use never anything oil that the efe in mine.
Using Motul (8100 5w-40 initially then 0W-40) since 8 years in my Honda City '09 and I replace engine oil myself every year. Engine is smooth and gives decent mileage. Never faced any issues
I used so many brands
- Motul : okay
Could be the oil and not any problem with the engine itself. In India, these engines come with Motul 7100 full synthetic oil. There have been some discussions on the 390Duke forums and on Reddit that the oil burning issue and high oil consumption is caused by using Motul 7100
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In March 2026 on PartReview, engine oil MOTUL were overall better than OEM Subaru.
In March 2026 on PartReview, engine oil MOTUL were overall more popular than OEM Subaru.
By vote balance, engine oil MOTUL surpassed OEM Subaru:
By number of reviews, engine oil MOTUL surpassed OEM Subaru:
In March 2026, according to PartReview, engine oil MOTUL led more car-specific ratings than OEM Subaru:
MOTUL are chosen by owners of cars such as: BMW X3, Renault Megane, Audi TT, and others.
OEM Subaru are chosen by owners of cars such as: Subaru Forester, Subaru Impreza, and others.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of engine oil MOTUL with: Mobil, Castrol, LIQUI MOLY, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota, Mannol.
Also available: comparisons of engine oil OEM Subaru with: Mobil, Castrol, LIQUI MOLY, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota, Mannol.
You can also see who is better among other engine oil manufacturers: Mobil or Castrol, Mobil or LIQUI MOLY, Mobil or MOTUL, Mobil or Shell, LIQUI MOLY or Castrol.
