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Originally Posted by Torkaholic
The Purolators are good, well made filters, but watch for one thing. In the "tall" size, the metal centertube does not extend the entire length of the filter. Look up the center opening on the bottom of the filter, and you'll see that the tube just ends about 3/4 inches before the top, leaving the filtration medium with nothing to support it. So, while I will happily use the Puro on my wife's Sequoia (centertube goes all the way up in this one), I won't for my G.
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Not sure which filter you are refering to. IMO, the PureOne PL14610 does not suffer from that. It has been my understanding that any filter with an end bypass relief valve HAS to have a sealed tube top to maintain flow separation. Here are cutaway pics of the PL14610...
Other reasons I went with PureOne over M-110 are:
1.) the price difference - PureOne can be had in my area oftentime at 1/2 the price of the M-1 filter;
2.) the difference in bypass relief valve psi. - the PureOne is rated 17psi vs. the M-110 at 25psi. Since I'm using synth oil in a cold climate, I understand the lower psi is more appropriate for my conditions;
3.) a better anti-drain back valve. Below is a picture of the Pure-One and the Mobil-1 anti-drainback valves. Both filters use the superior silicon rubber. The Pure-One has a larger core and a convex shaped mating surface to guarantee an excellent fit. The Mobil-1 has a flat seal and a flat mating surface which do not inspire the same confidence. The Mobil-1 anti-drainback valve isn't bad, it's clearly superior to that of most other filters. Many oil filter brands have a really cheap piece of plastic that doesn't seal very well at all.
But that's just my opinion and, of course, YMMV.