E10 as a new fuel at petrol stations. Contract Hirsch Performace tuned Saab E10? Hirsch writes:
All Saab models are E10-compatible, and this also applies to the performance enhancements of Hirsch Performance.
However, there is one exception:
Only for the 300PS and 305PS performance enhancements for the Saab 9-5 2.3T Aero it is recommended to use 5% or less ethanol admixture.
Source: Hirsch Performance