Hello all, I was given a Costco membership for Christmas so thought I would check it out this week and see what the fuss is about. I didn't have time to fully explore inside (because it's freaking massive) but I did stop by the fuel outlet. Diesel was 115 cents per litre compared to 135 at the servos around home. Costco membership is $60 per year ($55 for a business membership) - so with my diesel powered car averaging 7.5l/100 around town: 2500km/yr = 187.5 litres x 0.20 = $37.50 saving 5000km/yr = 375 litres x x 0.20 = $75 saving 7500km/yr = 562.5 litres x 0.20 = $112.5 saving 10000km/yr = 750litres x 0.20 = $150 saving So just under 5000km year you save enough to cover your membership. Even at only 10 cents per litre difference just over 8000kms would recover the cost. If your car uses more fuel the savings would be better. I know costco also sells tyres and bottles of water etc so whether or not you could also save a bit on those I'm not sure. Apart from Costco the cheapest fuel seems to be around the intersection of Henley Beach Road and Holbrooks Road where the mogas, liberty and OTR seem to be having a price war - not sure how long that will last though. Thoughts? Anyone else on here buying their fuel from costco?