I just finished cutting open a Super Tech and a Purolator Premium Plus oil filter for my new PT cruiser to compare them.
The Purolator is a very sturdy design with a spring loaded bypass valve in the bottom of the filter element itself. This valve when unseated did not seat very easily, maybe during hard acceleration, if unseated, it would not seat properly. But, then again with oil in the filter it just might work ok. The canister and flange are very solid. The leaf spring in the bottom of the filter is reasonably strong, keeping things in place well. The anti-drainback valve is very well made and would not leak back much if at all.
The Super Tech has an even thicker flange and easily as sturdy caseing. The filter elements looked the same, although I did not measure the square inches. The anti-drain back valve again, is very well made. The bypass is sort of built into the bottom of the filter element and uses the spring in the bottom of the filter to cover holes in the bottom of the filter element itself. When in bypass mode the metal distorts ever so slightly and opens these holes. Upon relief the holes are covered again forcing oil through the media once again. A quite different design, but I think it would work.
All in all, I think the Super Tech filters are equal to any oil filter out there and for $1.97 you just can't beat them.
For the price of the two filters you can see for yourself the designs. Two slightly different ways of skinning the same cat.
Bob
The Purolator is a very sturdy design with a spring loaded bypass valve in the bottom of the filter element itself. This valve when unseated did not seat very easily, maybe during hard acceleration, if unseated, it would not seat properly. But, then again with oil in the filter it just might work ok. The canister and flange are very solid. The leaf spring in the bottom of the filter is reasonably strong, keeping things in place well. The anti-drainback valve is very well made and would not leak back much if at all.
The Super Tech has an even thicker flange and easily as sturdy caseing. The filter elements looked the same, although I did not measure the square inches. The anti-drain back valve again, is very well made. The bypass is sort of built into the bottom of the filter element and uses the spring in the bottom of the filter to cover holes in the bottom of the filter element itself. When in bypass mode the metal distorts ever so slightly and opens these holes. Upon relief the holes are covered again forcing oil through the media once again. A quite different design, but I think it would work.
All in all, I think the Super Tech filters are equal to any oil filter out there and for $1.97 you just can't beat them.
For the price of the two filters you can see for yourself the designs. Two slightly different ways of skinning the same cat.
Bob