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Just been looking at the new refuelling regs for diesel as opposed to petrol. It seems the flow restrictor allowed on the diesel rig has a maximum inside diameter of 38mm whereas the petrol (gasoline) flow restrictor has a narrower inside diameter of 33mm.
This implys (to people like me who have little or no technical understanding) that not only will the diesel powered P1's refuel less often, but when they do refuel, will be able to do so more quickly which will further disadvantage their petrol powered adversaries!
Why the discrepancy? Am I right to assume that diesel is a more viscous liquid with a slower flow rate, the larger diameter flow restrictor simply compensating for its different properties?
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