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REF: Oiling & Lubrication
HD Super Premium 5 vs Napa 7148 5 micron oil filter
Article by rocketmangb of the XLFORUM 1)
Both filters have a top bypass.
This means that if the filter does bypass, oil runs across the top of the filter.
Unlike the old filters which had a bottom bypass (many still do).
A filter with a bottom bypass will wash the crap out of the media right in to the engine.
HD Super Premium 5 Napa Gold 7148 - black Napa Gold 7348 - chrome 2) | Left to right: HD Premium 5 - Napa 7148 - Napa 7348 3) | This tubing cutter style tool was used to cut open the filters. 4) |
Cutting open the Napa filter. 5) | |
Cutting open the HD filter 8) | ||
HD filter internals 9) | ||
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photos by rocketmangb of the XLFORUM http://xlforum.net/forums/showthread.php?t=2064599&highlight=oil+filter
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photo by rocketmangb of the XLFORUM http://xlforum.net/forums/showthread.php?t=2064599&highlight=oil+filter
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photos by rocketmangb of the XLFORUM, annotations by Hippysmack http://xlforum.net/forums/showthread.php?t=2064599&highlight=oil+filter