What is the real-world MPG of a SEAT Leon SC?
Owners report an average of 48.3 mpg across all SEAT Leon SC engines with data, about 81% of the official combined figure. The engine tables on this page give the figure for each engine and generation.
SEAT Leon SC MPG: what owners actually get
Owners report 48.3 mpg from a SEAT Leon SC, about 81% of the official figure. On its NEDC-tested engines that is 81%, about typical: the median NEDC-tested car in this 8,216-engine dataset returns 82%. The tables below give the figure for every engine and generation we hold. Add your own at the bottom and the averages get better for the next buyer.
48.3mpg
Real-world average, all engines
81%
of the official combined figure
29–68
Range reported by owners (mpg)
133
Owner submissions
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SEAT Leon SC
| Engine | Official (NEDC) | Official (WLTP) | Real MPG | % of official | Owners report |
|---|---|---|---|---|---|
| 1.2 TSI 105 | 57.6 | – | 50.1 | 87% | 47.3–53.0 |
| 1.2 TSI 105 DSG | 57.6 | – | – | – | – |
| 1.2 TSI 110 | 57.6 | – | 48.5 | 84% | 44.5–54.4 |
| 1.2 TSI 110 DSG | 57.6 | – | – | – | – |
| 1.4 EcoTSI | 57.6 | – | – | – | – |
| 1.4 EcoTSI 150 | 57.6 | – | 44.3 | 77% | 37.0–52.0 |
| 1.4 EcoTSI 150 DSG | 57.6 | – | 47.2 | 82% | 45.0–49.0 |
| 1.4 EcoTSI DSG | 57.6 | – | – | – | – |
| 1.4 TSI 140 | 53.3 | – | 45.1 | 85% | 35.0–51.6 |
| 1.6 TDI 105 | 74.3 | – | 57.4 | 77% | 57.0–58.0 |
| 1.6 TDI 105 DSG | 72.4 | – | 63.6 | 88% | 57.6–68.0 |
| 1.6 TDI 110 | 70.6 | – | 58.4 | 83% | 56.6–60.1 |
| 1.6 TDI 110 DSG | 72.4 | – | – | – | – |
| 1.6 TDI 110 Ecomotive | 85.6 | – | 52.5 | 61% | 51.0–54.0 |
| 1.8 TSI | 47.1 | – | 36.6 | 78% | – |
| 1.8 TSI DSG | 48.7 | – | 38.7 | 79% | 38.3–39.1 |
| 2.0 TDI 150 | 64.2–68.9 | – | 56.8 | 85% | 50.0–62.3 |
| 2.0 TDI 150 DSG | 62.8–64.2 | – | – | – | – |
| 2.0 TDI 184 | 62.8 | – | 51.1 | 81% | 44.0–60.2 |
| 2.0 TDI 184 DSG | 60.1–61.4 | – | 50.8 | 84% | 43.0–56.0 |
All figures in miles per gallon (UK). “Owners report” is the spread of individual submissions for that engine.
Add your SEAT Leon SC Real MPG
What does yours actually do? Read it off the trip computer over a full tank or work it out from litres and miles. No postcode, no sign-up. The more people add, the better the averages get, and this page stays free.
SEAT Leon SC fuel economy questions
Why is the SEAT Leon SC real MPG lower than the official figure?
Official figures come from a laboratory test cycle, not the road. Cold starts, short trips, hills, load, tyres and driving style all cost fuel the test does not see. A gap of 10 to 30 per cent is normal; a much bigger gap on one engine usually points at a fault, a heavy right foot, or a diesel that never gets warm.
Where did the Honest John SEAT Leon SC Real MPG page go?
The site closed in August 2026 and its Real MPG section went with it. This page is where the SEAT Leon SC figures now live: rebuilt from the archived dataset, with the official figures kept alongside, and reopened for new submissions.
Looking at a SEAT Leon SC right now? Check the advert before you go and see it.
Where the SEAT Leon SC figures come from
If you used the Honest John Real MPG section before the site closed in 2026, this is where the SEAT Leon SC figures now live. The owner-reported averages above were rebuilt from the archived dataset (archived page, 2026-08) alongside the official NEDC and WLTP figures and new submissions from CarAdCheck readers, and the section is open so they keep improving. Real-world figures also feed the running-cost estimate in our free advert check.
CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. How we rebuilt Real MPG.
Other SEAT models
Before you go and see it
Fuel economy is one line on the SEAT Leon SC running-cost sheet. These guides cover the checks that stop you buying the wrong one.
How to haggle for a used car: negotiate the price with what its records showHPI check vs carVertical: which is better, and our pick for a UK carMOT advisories explained: how to check them, and which ones should worry you
All buyer's guides →