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MethodologyAbout

Automotive

Champion COS3506 Spin-On Oil Filter, 1 Pack

Automotive4.8· 73 Amazon ratings

Bias-adjusted across 73 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Automotive.

86.1%
Percentile · Global
89.2%
Percentile · Cohort
Automotive
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Champion COS3506 Spin-On Oil Filter, 1 Pack

How the score was built

Amazon ratings
73

used for the Bayesian percentile

Raw star average
4.8 / 5

unadjusted Amazon mean

Bayesian avg
4.51

raw rating shrunk to the category prior

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Same category · Automotive

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