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Mann (oem) vs aFe (dry) air filter

1) eval conditions
  • break in completed half way through pre tune runs (7 fills)
  • tune was installed half way through oem filter runs (14 fills)
  • afe filter always had tune (54 fills)
  • overall runs are 30% city / 70% <2hr hwy (estimated)
  • 50% oil level maintained / F=36psi/R=32psi (cold) monitored / oem alignment
  • similar driving weight / oem aerodynamics+suspension / oem plugs / oem coolant

-> so will just use raw data (status / mileage / miles / gallons)
(should be relevant since every fill was topped to similar level at the filler neck)

2) oem filter data

a) breakin
0~2243mi / 2243mi / 80.799 gal -> 27.760mpg

b) pre tune
0~4434mi / 4434mi / 158.162gal -> 28.035mpg

c) post tune
4434~9707mi / 5273mi / 180.719 gal -> 29.178mpg

3) afe filter data

d) with tune
9707~27848mi / 18141mi / 617.344gal -> 29.386mpg

4) eval results
  • tune had positive effect (a) -> (b)
  • afe filter had minimal positive effect (c) -> (d)

5) comments
makes sense since the m270 intake track isnt a limiting factor (per dyno runs)
main benefit => washable / reusable / multilayer
(NOT SINGLE LAYER PAPER better protection against punch through)

6) for reference per tank fill (at 27848mi / 2721 days)
average mpg -> 29.36mpg data / 30.3mpg gauge
low mpg -> 26.24mpg data / 22.8mpg gauge
high mpg -> 34.22mpg data / 36.1mpg gauge


motor seems to be aging gracefully :cool:
 
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