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i have never got bad fuel from Asquith...
but i never go just after the tanker has filled up either...
maybe it is your imagination, or the weather, or a sensor is unplugged/loose or your clogged air filter, or your clogged fuel filter, or your dirty spark plugs or old oil or or or or ...
or maybe you over-reved on the OP?
who knows...
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usually due to misfiring but can be because your injectors may need to be examined. either that or a really, really bad batch of fuel...but highly unlikely. run the fuel through, and if it happens to your next fill-up, get your injector flow-tested and cleaned
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its very unlikely to be your injectors... i recon check / replace your plugs first.... and also check your ignition timing and basic tuning.
Regards James