Cool where Subaru put the oil filter on the boxer engine, right on top. Is it messy to change? Seems like it would start spilling out as you unscrewed it.
Originally Posted by Virtus_Probi
Originally Posted by SubieRubyRoo
Originally Posted by oil_film_movies
A little known but very good, efficient oil filter (94% at 20 microns 4548-12) for a high-bypass subaru is the HP17, as it has a 22 psi bypass pressure, silicone ADBV like the good ones, &
a bonus screen over the bypass valve.
http://www.fram.com/media/1075/fram-racing-filter-sell-sheet.pdf
Not on the HP6 or HP17, so that's not a bonus...
I think I priced out the HP17 once and was shocked at how expensive it was! If you really want to blow some serious money on an oil filter, go for the cherry blossom pink STI version...seen them in the $30-50 range.
Its true, the Fram Racing HP17 for a Subaru on Amazon.com is $18 (free prime ship, no tax) kinda steep, I guess not too bad though. I use a Wix WL10255 $9 equiv to an $18 Fram Racing HP18 (PF63E replacement) in my tiny Chevy 92 cubic inch turbo app, and was also scared off by the high-ish price.
.... For a high-flow Subaru engine, I'd seriously consider using the high-flow HP17, still efficient enough at 94% at 20microns and flows at least 10 gpm no problem.
Originally Posted by sw99
The
HP17 shows a bypass of 16-28 so I would rather have a filter spec'd at the specific 23 psi that Subaru uses on their filters. Personally I use the Premium Guard PG4615 filters that cost me under $2 shipped (in bulk). They have the 23 psi bypass and are perfect for the newer recommended 6K interval that Subaru has been using of late. I actually run them to 7500 with full synthetic and they hold up fantastic. Just my .02
I understand your confusion. Sometimes its stated as a range, & other times as a single number.....
The bypass valve is on a spring, so it begins opening at 16 psi and is fully open at 28 psi, and thats the same as saying it has a 22 psi threshold. Any oil filter has a spring that has a nearly constant elastic modulus, and you get a "crack" open at much smaller pressures than the simpler advertised spec of 22 or 23 psi.