Less easy to put into the calculations but something to think about at Costco is the waiting I mentioned. It can be up to twenty minutes at peak times but it's not really the time sat there but unless you want to idle the motor for that amount of time there's A fair bit of stopping and restarting the engine.jameswhitfield wrote: ↑Wed Sep 30, 2026 1:42 am
grenfell, the Costco sums are the same as the motorway ones in reverse. Ten pence on 50 litres is £5, so a 40 mile round trip only pays if you were going anyway, which it sounds like you are.