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Not for the first time the ad blue reminder has recently pinged up on the display. However, this time it got me thinking – Why does it say Min 2 Gal Max 2.75 Gal? Surely VW have never used gallons in their entire existence and we in the UK have only bought 🍺 🍺 in pints or gallons for ages, certainly no motoring fluids! You buy ad blue in litres!