We heard it was coming - just received this email.
We’ve changed the way Fuel Price Lock works by introducing a maximum saving of 25 cents per litre (see section 16).
If the difference between the pump price and the price locked in by Fuel Lock exceeds the 25 cents per litre maximum discount, the price will automatically adjust so that you receive the maximum 25 cents per litre saving.
You will still pay the lower pump price if the price at the pump is lower than your Fuel Lock price.
Considering the catchment area I work in is currently <$1.75 to where I live being >$2.15 I will have to make sure to fill up near work to get the better price.
But when you have stations that are inside the catchment area raise their price to the difference above, that is going to p!ss people off if they are not passing on the full saving if you are within 5km of the cheaper station.
I am dubious about the price lock however, I've been at a 7/11 station post fill where the price was at least 10c cheaper that the other local ones, but when I scanned for the best price it kept giving me the more expensive one. Tried everything from killing the app, turning off/on location services and restarted the phone but it still wouldn't give the better price.