Nobody come and shoot me down, but I always get worse fuel economy with Shell premium fuel so I switched to Tesco years ago.
This week my commute has been 38 miles each way and I’ve used two different fuels. Note, readings are from the display.
On Tesco Momentum (my usual tipple) I was averaging 51/52mpg there and back which is typical for what I normally get.
I couldn’t be bothered going to Tesco’s the other day so I filled up with Texaco Supreme down the road from me. Next day to work and back I realised I was getting more like 58/59mpg.
Similar temps, 90% of journey is sat in cruise at either 70mph or 50mph in speed limited areas.
@Mike Coulter; I won’t shoot you down!
Standard unleaded v’s premium unleaded and supermarket v’s branded fuel and the relative merits of each are car-related subjects that are often discussed on forums - same with DSG v’s manual transmission, leather v’s cloth upholstery, petrol/diesel v’s electric, dealer servicing v’s independent servicing. There’ll no doubt be other subjects too that can divide opinion.
It can be quite difficult to do accurate comparative mpg tests between different fuel brands as there are many factors that’ll affect mpg. As you’re driving a reasonable distance using the same route under very similar conditions with the main - if not the only - difference being the type / brand of fuel used, then that should give a pretty good indication of whether one fuel is better than another in terms of mpg achieved. However, price shouldn’t be ignored, and premium branded fuels will usually cost more that supermarket fuel, so any additional cost per litre v’s improvement in mpg needs to be factored in.
I pretty much always use supermarket fuel because it’s convenient for me to fill up when doing a supermarket run, and apart from a mega expensive filling station selling Gulf fuel in a village near me, there are virtually no filling stations on the routes I regularly drive. I also don’t bother too much about mpg, as I drive relatively few miles these days (even fewer during lockdown!) and fuel economy wasn’t one of the main considerations for me when I bought my car.
