Engine oil Shell or RED LINE

Shell Engine oil
QueenAlpaca
  • Exhaust smoke:
Rating 5.0

using a heavier oil weight has been an old trick to help with oil consumption in Subarus for a long time now. I used to use Rotella 5w40 (before the reformulation) in my old 04 Baja Turbo and that particular oil was the best to keep the oil burning down.

Pros: keep oil burning down
Vehicle: Subaru
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Shell Engine oil
Familiar_Play_4915
  • Engine noise:
  • Exhaust smoke:
Rating 5.0

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.

Pros: healthy engine, no issues
Mileage: 370000 km
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Other comparisons

Which engine oil to choose — Shell or RED LINE?

If choosing engine oil across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.

We compare engine oil across these categories:

Comparison of engine oil Shell and RED LINE
  1. PR Score.
  2. Overall ranking.
  3. Vote balance.
  4. Average rating.
  5. Number of reviews.
  6. Feature ratings.
  7. Car owners’ choice.

Which engine oil are better — RED LINE or Shell?

In March 2026 on PartReview, engine oil Shell were overall better than RED LINE.

  1. Shell received a PR Score of 94 out of 100, and RED LINE scored 94 points.
  2. Shell ranked 4 in the overall ranking, and RED LINE ranked 9.
  3. The average rating is higher for RED LINE (4.6) than for Shell (4.5).
  4. Engine oil RED LINE have better feature ratings than Shell:
    • Engine noise - owners believe, that this property for Shell is better than RED LINE.
    • Warning light - drivers claim, that this property for RED LINE is outperforms Shell.
    • Exhaust smoke - reviews suggest, that this property for RED LINE is preferred to Shell.

Which engine oil are more popular — Shell or RED LINE?

In March 2026 on PartReview, engine oil Shell were overall more popular than RED LINE.

By vote balance, engine oil Shell surpassed RED LINE:

  • For Shell, the ratio of positive (1007) to negative (62) votes is 945 votes.
  • For RED LINE, the ratio of positive (232) to negative (13) votes is 219 votes.

By number of reviews, engine oil Shell surpassed RED LINE:

Which engine oil do car owners prefer — Shell or RED LINE?

In March 2026, according to PartReview, engine oil Shell led more car-specific ratings than RED LINE:

Shell are chosen by owners of cars such as: Honda Jazz, Subaru Outback, Subaru Impreza WRX, Subaru Legacy, Volkswagen Scirocco, and others.

RED LINE are chosen by owners of cars such as: Audi S3, and others.

Other comparisons of engine oil

If this comparison didn’t fully answer your question, there are many others on PartReview.

For example, comparisons of engine oil Shell with: Mobil, Castrol, LIQUI MOLY, MOTUL, AMSOIL, VALVOLINE, PENNZOIL, OEM Toyota, Mannol, RAVENOL.

Also available: comparisons of engine oil RED LINE with: Mobil, Castrol, LIQUI MOLY, MOTUL, AMSOIL, VALVOLINE, PENNZOIL, OEM Toyota, Mannol, RAVENOL.

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.

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