Maybe Mobil did lower the specs. Maybe they are using a media that will take the 20K mile use rating? If there is a warranty claim, the customer has to contact MANN+HUMMEL Purolator.
www.mobil.com
True ... you need flow, viscosity and the associated dP with those parameters to make comparisons. But like I mentioned above, all these oil filters only have a few PSI of dP difference at pretty high flow rates. It's not worth trying to pick an oil filter of known good brands just based on the dP vs flow. If it was some off-brand filter of unknown origin then you might be more concerned about the flow vs dP curve.
Yes, the numbers indicate it has less dP vs flow. Keep in mind that 16 kPa is only 2.32 PSI, and 14 kPa is 2.03 PSI. Even if the that was doubled at 4 PSI, your oil pump won't care and it will still be sending the same oil volume through the filter and engine. That's why positive displacement oil pumps are used on engines.
Maybe, but it seems that most people on this site who pay attention found a new filter supplier when Mobil went to the “A” filter models…
Maybe Mobil did lower the specs. Maybe they are using a media that will take the 20K mile use rating? If there is a warranty claim, the customer has to contact MANN+HUMMEL Purolator.
Mobil 1™ Extended Performance Oil Filter limited warranty | Mobil™ Motor Oils
Mobil 1™ Extended Performance oil filters, manufactured by Champions Laboratories, Inc., are warranted to be free from defects in material and workmanship.
ISO 4548-12 efficiency is shown on Fram's website.
Can you link to that? I can find their blanket statement on FS8A, FS3387A and FS4967 models filters, but no such specific data on ones that fit a Honda with M20x1.5 threads.
Their statement is based on the average efficiency of those three different sized models, which they are using to define the efficiency of the FS model line. You won't get specific "spec sheets" for each specific filter like M+H does.
Yeah, to me that's like a restaurant chain claiming a Grade A sanitation rating, with a asterisk to explain it's based on the rating of three locations.
Better than some filter makers that base the efficiency on just their largest sized filter. Using 3 different sizes like Fram does helps take out the filter size effect on efficiency.
