- By George
- December 18, 2016
- Comments Off on Inside a Low Cost, $2.84, Walmart Supertech ST6607 Oil Filter
Walmart sells a line of oil filters manufactured by Wix under the Walmart Supertech label. All Walmart Supertech oil filters have a low price of $2.84 regardless of the filter size or application. I purchased a Walmart Supertech ST6607 oil filter to review because it is similar to the STP S6607 I reviewed earlier, and I have seen the filter recommended for motorcycle use. I am not sure how the filters performance rating compares head to head with say a FRAM Extra Guard other than the efficiency rating is lower, but more about that later. The filter consists of a paper filter element, metal end caps, nitrile drain back valve, bypass valve built into the drain back valve, base plate with 8 inlet holes and a white metal filter housing. The filter uses a weird type of rubber bypass valve built into the rubber drain back valve. See photos….. The bypass valve looks like a design used to cut cost and not a design for performance. I would be concerned about the Supertech ST6607 bypass valve allowing more oil to bypass the paper filter element under normal engine operation than the typical spring loaded bypass valve seen in better oil filters. I can’t find any specifications for this oil filter other than what is written on the oil filter box, and it doesn’t give a psi rating for the bypass valve. However, it does give an efficiency rating that is a bit misleading.
Walmart Supertech ST6607 oil filter has “95% EFFICIENCY RATING*” written across 4 sides of the 6 sided oil filter box. When you look at the back of the box it says “*Per ISO 4548-12 at 29 microns” in smaller print. This type of advertising is misleading if you fail to read everything. 20 microns seems to be the standard particle size when determining oil filter efficiency ratings for other brands. All FRAM Extra Guard filters have a 95% efficiency rating at 20 microns. That means FRAM Extra Guard oil filter’s can trap 95% of particles 20 micron or larger in size, but Supertech oil filter’s can only trap 95% of particles 29 microns or larger in size, so at 20 microns the Supertech ST6607 oil filter has a much lower efficiency rating than the one advertised. If you don’t read the small print you walk away thinking Supertech oil filter’s are equal to a FRAM Extra Guard for 1 or 2 dollars less. This reminds me of how battery manufacturers print the cold cranking amps, CCA, on the battery showing how much energy a battery can deliver. Some shady battery manufacturers will print cranking amps, CA, instead of the CCA rating, which is always a higher number because the test is performed at 32F instead of 0F. Lead acid battery capacity decreases as the temperature decreases. The buyer who doesn’t know the difference walks away thinking they bought an equal or better battery for less money. This same type of questionable advertising is happening with the Walmart Supertech oil filters.
I will never recommend a Supertech oil filter to anyone unless you absolutely must have an oil filter, and you only have $3 dollars to spend and no possibility of scraping up another $1 or $2 to upgrade to a better filter. The only redeeming qualities Walmart Supertech oil filters offer is their $2.84 price tag, and they are easy to find. That’s it!
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