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Discussion Starter #1
Buying an Astra 1.4T (150PS) and have got really interested in their ECU piggyback box with 7 different performance levels, more so on the 1st setting that's supposed to give up to 20% better fuel efficiency, while still giving a good 26BHP / 30NM extra kick.
Multiple people have commented seeing less fuel usage with the box installed, BUT someone pointed out that it could be just the box tricking the car's computer.
TL;DR: has anyone tested, doing the math liters x km, whether this box has really any efficiency gains on any setting over 1+ full petrol tanks? Cheers from NZ
 
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