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Paul K · 01-04-2011, 06:28

Our old petrol focus (52 plate) was always filled up with tesco fuel, never saw any issues with it, when we got our 08 plate Diesel fusion we continued to use supermarket fuel to start BUT after a long road trip one day we were nowhere near a supermarket and needed to fuel up. After filling with Shell standard diesel we were surprised to notice a response difference in the engine, it always seemed a little laggy previouosly but now was pulling lower range revs easier and building up speed faster.
We thought it was coincidental but allowed the fuel to run down and then filled up again with Tesco, the lag returned. Since then we have always used Shell and have seen a slight increase in MPG and an increase in performance. We don't know how true the anecdotal information online is but some are saying that the newer diesel engines (the ones with lower emissions) seem to struggle with supermarket fuels due to particulate sizing.

01-04-2011, 06:28	#55
Paul K Inactive Join Date: Jun 2003 Location: Essex innit Age: 50 Services: Sky HD + 16Mb ADSL BT Telephone Posts: 15,735	Re: Is supermarket fuel good enough? Our old petrol focus (52 plate) was always filled up with tesco fuel, never saw any issues with it, when we got our 08 plate Diesel fusion we continued to use supermarket fuel to start BUT after a long road trip one day we were nowhere near a supermarket and needed to fuel up. After filling with Shell standard diesel we were surprised to notice a response difference in the engine, it always seemed a little laggy previouosly but now was pulling lower range revs easier and building up speed faster. We thought it was coincidental but allowed the fuel to run down and then filled up again with Tesco, the lag returned. Since then we have always used Shell and have seen a slight increase in MPG and an increase in performance. We don't know how true the anecdotal information online is but some are saying that the newer diesel engines (the ones with lower emissions) seem to struggle with supermarket fuels due to particulate sizing.