Which Opel diesel engine is the most reliable?

The late GM-era 1.6 CDTI has a good name for refinement and economy, and the 1.3 CDTI holds up well in the Corsa with regular servicing. On the 2.0 CDTI, check the particulate filter and EGR valve.

Which DGT label does a diesel Opel get in Spain?

A Euro 6 diesel Opel, generally registered from September 2015, gets the C label. Diesels from 2006 meeting Euro 4 or Euro 5 get the B label, with growing limits in low-emission zones.

Does an Opel 1.5 Diesel need AdBlue?

Yes, Opel's 1.5 Diesel uses selective catalytic reduction with AdBlue, filled into its own tank. Ignoring an AdBlue warning can stop the engine from starting.

Cars

Used diesel Opel cars in Spain

Found 3,003 cars

From €999 to €47,500, half under €12,420 · Typically 2020 with 108,044 km · Most listed: Opel Combo, Opel Astra, and Opel Insignia. GM-era Opel diesels use the 1.3, 1.6 and 2.0 CDTI, while post-2019 cars use Stellantis's 1.5 Diesel with AdBlue; for high motorway mileage they remain the brand's most economical choice.