The 50 questions UK drivers search most after misfuelling
The question UK drivers search most after misfuelling is "what happens if you put petrol in a diesel car", in the Fuel Fixer Google Ads search-terms report covering the account's lifetime to its August 2026 export.
The fifty question-form searches — those starting what, how, can, will, is, does, should, why or "I" — that received the most impressions in the Fuel Fixer Google Ads account, ranked, with each question's share of impressions among all question-form searches. Account lifetime to the August 2026 export. Useful for seeing what drivers actually want to know at the roadside.
Misfuelling questions at a glance
| Version | 2026.10 |
|---|---|
| Last updated | 3 October 2026 |
| Rows | 50 |
| Source | Fuel Fixer Ltd, Google Ads search-terms report (account lifetime, exported August 2026) |
| Licence | CC BY 4.0 |
| Formats | CSV, JSON, Parquet, Croissant |
Top misfuelling questions: first 15 rows
| rank | question | share of question impressions pct |
|---|---|---|
| 1 | what happens if you put petrol in a diesel car | 5.48 |
| 2 | what happens if you put diesel in a petrol car | 3.46 |
| 3 | i put 5 litres of petrol in my diesel car | 2.18 |
| 4 | what happens when you put petrol in a diesel car | 1.47 |
| 5 | can you put petrol in a diesel car | 1.45 |
| 6 | what to do if you put petrol in a diesel car | 1.22 |
| 7 | can you put diesel in a petrol car | 1.19 |
| 8 | what happens if i put petrol in a diesel car | 1.05 |
| 9 | i have put petrol in my diesel car and drove it | 0.95 |
| 10 | i put petrol in my diesel car | 0.92 |
| 11 | i put diesel in my petrol car and drove | 0.85 |
| 12 | what happens when you put diesel in a petrol car | 0.79 |
| 13 | how to get petrol out of a car | 0.66 |
| 14 | what happens if you put adblue in diesel tank | 0.63 |
| 15 | what happens if i put diesel in a petrol car | 0.61 |
Method
Search terms were lower-cased and de-duplicated. A term counts as a question when it begins with a question word or with "I". Shares are of impressions across all question-form terms in the report, then the top fifty are kept.
Limitations
Reflects searches the ads were eligible for, not total UK search volume. Near-identical phrasings are kept separate on purpose: the exact wording is the data.
Sources
Fuel Fixer Ltd, Google Ads search-terms report (account lifetime, exported August 2026). How the report is produced: Google Ads Help, search terms report.
Download the top misfuelling questions data
- CSV sha256 92d23ec715c62b98…
- JSON sha256 22ff52190b221c0d…
- Parquet sha256 090821f5568044e5…
- Croissant JSON-LD for ML tooling
- Markdown version of this page
Cite this
Misfuel Doctor (2026). The 50 questions UK drivers search most after misfuelling (v2026.10). https://mis-fueldoctor.co.uk/datasets/wrong-fuel-search-questions/. CC BY 4.0.
Licensed under CC BY 4.0: reuse it, including commercially, with credit. See the licence page.
Sister data: Wrong Fuel Drain publishes the fuel-drain coverage dataset (catalogue: DCAT). Each dataset lives on one site only.