[GO4BROKE]

STP S5 STP website

Cost $2.99 -- Advanced Auto
ADBV material: Nitrile
Spring type: leaf
Intake area: 0.328 sq/in (5-6 of 12) (5-6 tie)
Filter area: 326 sq/in; 60 pleats (8-9 of 12)
Total Weight: 425 grams (3-7 of 12)
Filter and endcap weight: 5 oz (5-10 of 12)


Physical Rating: 20 (5-7 of 12)

Average pore size: 38 µm (5 of 12)
Smallest pore size: 23 µm (1 of 12)
Oil flow @ 10psi: 10.5 oz per minute (8 of 12)


Pore and Flow Rating: 22 (3 of 12)



Overall Rating 42 (5 of 12)

This filter appears to flow well and have low to average filtration ability.

The STP S5 and the next filter, the AC Delco 1218 are identical filters in appearance. However, their media differs. Both filters are made by Champion filter. Note the "1" marking that is on the top of the filter.



Another comment about these two filters is that Mercury makes a "Mercury Racing" filter -- the 35-16595T. Outside appearance "signature" is the same as these two: the "1" marking, 5 intake holes with one larger than the other, eight seal pinch retainers, eight welds under the seal, and the same pattern of canister holes. Your choice is the STP at $3, the AC at $3.50, or the Mercury Racing at $11.

Here are the internal parts of the STP 5:



Here is the internal canister showing the size and pattern of holes. The ADBV has a good seal on the high lip of the top of the endcap. The filter material is very thick.



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AC Delco Duraguard PF1218 AC Delco website

Cost $3.49 -- Advanced Auto
ADBV material: Nitrile
Spring type: leaf
Intake area: 0.328 sq/in (5-6 of 12)
Filter area: 326 sq/in; 60 pleats (8-9 of 12)
Total Weight: 425 grams (3-7 of 12)
Filter and endcap weight: 5 oz (5-10 of 12)


Physical Rating: 20 (5-7 of 12)

Average pore size: 27.5 µm (10 of 12)
Smallest pore size: 14 µm (8-10 of 12)
Oil flow @ 10psi: 7.6 oz per minute (5 of 12)


Pore and Flow Rating: 29 (9-10 of 12)



Overall Rating 49 (7 of 12)

This filter appears to flow average and have very good filtration ability.

As mentioned in the STP section, this filter is identical in appearance to the STP S5 and the Mercury Racing 35-16595T. However, the filter media tests revealed that they are quite different. HosHere are photos showing top plate, assembly parts, and internal canister holes and filter.











Hastings LF279 Hastings Filters website

Cost $4.19 -- Local auto parts store
ADBV material: Nitrile
Spring type: spring
Intake area: 0.393 sq/in (10-11 of 12)
Filter area: 264 sq/in; 44 pleats (4 of 12)
Total Weight: 460 grams (8-9 of 12)
Filter and endcap weight: 5 oz (5-10 of 12)


Physical Rating: 23 (8 of 12)

Average pore size: 46 µm (2 of 12)
Smallest pore size: 21 µm (2-3 of 12)
Oil flow @ 10psi: 16.9 oz per minute (12 of 12)


Pore and Flow Rating: 29 (9-10 of 12)



Overall Rating 51 (9 of 12)

This filter appears to flow excellent and has lower than average filtration capability.

The Hastings filter has the second fewest pleats at 44, which gives it the least amount of filter surface area of the large canister filters. However, I believe this is a fluke manufacturing defect as Hastings technical support indicates that this filter should have 100 more sq / in of media.

It has eight intake holes in a small circle with eight welds.