Originally Posted By: UncleDave
Originally Posted By: horse123
For my Impreza in my signature. 5000 mile OCI right now.
My options are Mobil 1 M1-110, Fram PH7317 Extra Guard, Fram XG7317 Ultra, Fram TG7313 Tough Guard, Subaru 15208AA15A (blue filter), Purolator PSL14612, Bosch 3974, microGreen 101-7, K&N HP-1010 (I've been using this).
Does it really matter out of all of those? Just choose what's cheapest?
It matters to me, maybe not you though.
1. The Microgreen- is the only dual stage in the group. Full stop.
MG gets heat here because they only cite generic ISO testing, but you can look up PTFE filtration online and see its easy to come by 2 micron units.
They offer a unique value proposition and the only real differentiated product.
2. Then the Ultra- the current best single stage
2.5 Bosch distance +(not sure if thats the part number you selected) is either tied with or just above the M1
3. -The Mobil 1
Amsoil isn't on the list but should be.
UD
Bosch D+ efficiency has always been advertised as 99.9% efficiency at 40 microns.
https://www.boschautoparts.com/en/auto/filters/distanceplus-oil-filters
The new Mobil 1 oil filters with an "A" suffix are rated 99+% efficient at 30 microns.
https://mobiloil.com/en/oil-filters/performance-oil-filters
Mobil 1 oil filters without the "A" suffix are rated 99.6% efficient at 25 microns.
https://drive.google.com/file/d/0Bz2NTEAdC4vxdDNXV05Yc0FHUGczaVRTeF9qb0FuTWt2bXRF/view?usp=drivesdk
What criteria are you applying to rate the Bosch D+ equal to or slightly above the M1 oil filter on your list?