K&N - experience in Jazz Sport

Discussion in '4th Generation (2015)' started by Eck, Monday 1st Jul, 2019.

  1. Eck Valued Contributor ★ ★ ★ ☆ ☆

    I have often wondered about the potential fuel consumption benefits of a K&N filter, the performance differences would be too difficult to quantify anyway.

    Being a fairly steady, routine routes and trips sort of driver I decided to try on on my 2018 Jazz Sport.

    I was going to base the trial over 6 fills and compare to the previous 25 since new.

    Now having done 3 1/2 fills (1265 miles) the results look like - 0.8mpg/0.18mpl improvement, i.e 7.04 miles range increase in full tank.

    This is a 1.69% improvement in range, and with my sort of driving style and use would require another 23 full fills at today's price locally (£1.239/l) to get the filter cost back - though a cleaning cost in the future will have to be included.

    I will update when 6 fills carried out.

    Performance - I do "feel" the car is more responsive in acceleration, this should be treated as tenuous at least.

    Hopefully will help others who may be thinking of this sort of refinement.
     
    Last edited: Tuesday 2nd Jul, 2019
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  2. Eck Valued Contributor ★ ★ ★ ☆ ☆

    One more fill, stats now - 0.88mpg/0.19mpl improvement, i.e 7.75 miles range representing a 1.86% improvement.
    Viewing the mileage I cover/year - currently 7862 it will save me £17.64/year, and with the K&N cost (£50.39) plus cleaner cost (£15.39) will take 3.73 years to break even.
     
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    Duc de Pommfrit likes this.
  3. Eck Valued Contributor ★ ★ ★ ☆ ☆

    One more fill, stats now - 0.47mpg/0.10mpl improvement, i.e 4.09 miles range representing a 0.98% improvement.
    Viewing the mileage I cover/year - currently 7918 it will save me £9.25/year, and with the K&N cost (£50.39) plus cleaner cost (£15.39) will take 7.11 years to break even.
    The much affected figures due to a period of higher speed and load of people + luggage in this period giving a reduced MPG (roughly 3mpg).
    Will stop monitoring after 10 fills, but so far would say from the cost saving point of view does not look worth it for me given I do not keep cars for too long.
     
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