This has been the most difficult pre-season Formula 1 test to read anything into that I've ever known, mainly thanks to the usually cold, often wet and sometimes snowy conditions that have hit the resurfaced Barcelona circuit.
But you can always learn something from what happens on track, so despite those problems on top of the usual question marks over fuel loads, run plans, tyre choices and how hard drivers are pushing I've attempted to produce a car ranking that at least will give a pointer to how the season is shaping up.
We'll learn a lot more at next week's second test, so none of this can be taken as gospel. But by looking at the fastest lap times set by each team, adjusting it for what we know about fuel load based on how many laps were completed on the run that they did their fastest lap on and what the teams have tended to run with in recent years, and then putting in an adjustment factor for the tyre compound being used, you can extrapolate what time might have been possible at the start of that run with lower fuel.