Castrol vs Pennzoil:Which is more popular by branded search?
In August 2026, Castrol had more branded searches than Pennzoil among motor oil brands worldwide. Castrol was estimated to have 246K branded searches compared to Pennzoil’s 49.5K, and held a 5% Share of Search versus Pennzoil’s 1%. These are worldwide searches for English-language branded terms.
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Which is more popular in search, Castrol or Pennzoil?
Compare the motor oil brands motorists use. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.
Share of Search by month for Castrol, Pennzoil. The figures are in the table below the chart.
View monthly share of search table
| Month | Mobil | Valvoline | Liqui Moly | Castrol | Pennzoil | Shell Helix | Quaker State |
|---|---|---|---|---|---|---|---|
| Oct 2025 | 66.2% | 16.3% | 10.9% | 4.9% | 0.98% | 0.44% | 0.44% |
| Nov 2025 | 63% | 18.9% | 10.3% | 5.7% | 1.1% | 0.51% | 0.42% |
| Dec 2025 | 65.3% | 16% | 10.7% | 5.9% | 1.2% | 0.53% | 0.43% |
| Jan 2026 | 62.8% | 18.9% | 10.3% | 5.6% | 1.4% | 0.51% | 0.51% |
| Feb 2026 | 60.6% | 18.2% | 12.2% | 6.7% | 1.3% | 0.6% | 0.49% |
| Mar 2026 | 66% | 16.2% | 10.8% | 4.8% | 1.2% | 0.53% | 0.44% |
| Apr 2026 | 63.7% | 15.7% | 12.8% | 5.7% | 1.2% | 0.52% | 0.42% |
| May 2026 | 68.2% | 13.7% | 11.2% | 5% | 1% | 0.45% | 0.37% |
| Jun 2026 | 69.7% | 14% | 9.4% | 5.1% | 1% | 0.46% | 0.38% |
| Jul 2026 | 69.7% | 14% | 9.4% | 5.1% | 1% | 0.46% | 0.38% |
| Aug 2026 | 68.2% | 13.7% | 11.2% | 5% | 1% | 0.45% | 0.37% |
| Sep 2026 | — | — | — | — | — | — | — |
How has the Castrol and Pennzoil comparison changed over the last 12 months?
3 findings
- Castrol was ahead of Pennzoil in every measured month of the 11 months ending August 2026.
- Across the 11 months ending August 2026, Castrol’s estimated Share of Search among motor oil brands worldwide moved from 4.9% to 5%, and its estimated monthly branded searches held steady at 246K.
- Across the 11 months ending August 2026, Pennzoil’s estimated Share of Search among motor oil brands worldwide moved from 0.98% to 1%, and its estimated monthly branded searches held steady at 49.5K.
How did search popularity change for motor oil brands worldwide in August 2026?
0 changes
Neither Castrol nor Pennzoil moved beyond provider rounding among motor oil brands in August 2026.
How each brand is measured
Brandwave collects information about searches that people make online using Castrol’s and Pennzoil’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
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