Okay, Ste threw down the challenge a while ago on the Tractor Lotion thread like this:
It's time to take up the challenge... and I haven't got enough time to wait - it'll take me about a year to build enough miles!Anyone fancy doing some road tests to prove / disprove the performance gain claims? As no-one has risen to the challenge (even those who say SUL is the best thing ever invented) I can only say that no-one is willing to put their money where their mouth is.
This thread picks up from that thread. Here's what I'm proposing:
We need some other volunteers to bulk out the results, and to speed up the process - we'll all be in Chevy Volts before I can get round to testing all brands...
- You need to make no other changes (e.g. tyres, unless swapping for identical brand)
- Driver fills up on whatever is their regular brand for 3 tankfuls - defined as second click-stop on pump (round to a pound if that's your normal thing) down to fuel warning light blinking (usually 20 miles on my car - light on solid at 32 miles left)
- Reset trip computer (either counter on systems with two readouts) for each tank
- Driver posts the full tank average for the THIRD tankful (ParaPaul's suggestion based on petrol comparisons)
- Driver then tries one of the following diesel brands:
- Tesco/Sainbury's/Morrisons etc supermarket brand
- Main brand standard fuel (BP, Texaco, Shell Extra, etc)
- 'Premium' brand (specifically BP Ultimate and Shell V-Power)
- Run the new fuel for three tankfuls and report the third tank average mpg according to your trip computer.
- Report any immediate findings (quietness, responsiveness) on each tank if required, but DON'T record mpg until tank 3
It shouldn't make any difference if you run a 1.9(120), 1.9(150) or V6 CDTi because we're talking about a difference in your mpg, not going for the absolute hypermiling record for max mpg. However, it'll be good to compare similar experience to other drivers with the same engine, so include your motor in the report.
No poll on this one - I can't work out how to make it read sensibly!