It appears that the manufacture of the Miata OEM oil filter has changed. This is a result of a merger between Tennex and Malfe, a german company.
The Miata OEM is now made by Malfe I believe and is about .4cm smaller in dia and the o-ring is also .4 cm smaller. Then new filter does not appear to flow as well and older miata's with real oil pressure gauges are reporting lower oil pressure. The new filter is the size of all the aftermarket filters for this application I guess. The only filter that is close to the tennex is the Bosch premium for the MX6. This filter has the same size o-ring but the filter inself is smaller in dia but longer in length. Anyone know if Tennex makes another brand of aftermarket?? I checked stp,fram,mobil1 and bosch for a good replacement with only the bosch looking reasonable. Any other suggestions?
See filters: http://home.nycap.rr.com/boatxprt/Filters.htm
The Miata OEM is now made by Malfe I believe and is about .4cm smaller in dia and the o-ring is also .4 cm smaller. Then new filter does not appear to flow as well and older miata's with real oil pressure gauges are reporting lower oil pressure. The new filter is the size of all the aftermarket filters for this application I guess. The only filter that is close to the tennex is the Bosch premium for the MX6. This filter has the same size o-ring but the filter inself is smaller in dia but longer in length. Anyone know if Tennex makes another brand of aftermarket?? I checked stp,fram,mobil1 and bosch for a good replacement with only the bosch looking reasonable. Any other suggestions?
See filters: http://home.nycap.rr.com/boatxprt/Filters.htm