E5 premium petrol
GOV.UK explains E5 is the super grade at 97+ octane where a filling station sells two petrol grades.
Super unleaded searches are strong, especially around 99 RON, Tesco Momentum 99, Shell V-Power and retailer premium petrol.
Public data often reports premium petrol as Super unleaded E5. Route & Fuel adds 97/99 RON labels for common retailers and keeps uncertain products generic rather than guessing.
GOV.UK explains E5 is the super grade at 97+ octane where a filling station sells two petrol grades.
Route & Fuel maps common retailer products to 97+ or 99 RON where the label is reliable.
Premium fuel can be expensive, so the app checks detour fuel cost and route fit as well as pump price.

The Department for Transport explains that E10 is standard 95 octane petrol and E5 is the super grade at 97+ octane at stations selling two petrol grades. Route & Fuel applies clear RON mapping rules on top of public E5 data.