Originally Posted By: MONKEYMAN
Originally Posted By: goodtimes
Mobil 1 has one year or X miles on their box. People seem to skip over the one year. There have been fully clogged and encrusted oil filters shown on here with low mileage, like 3-4 K. Telling people to run a filter for 20-30K because the box has 20k written on it somewhere, is not good advice in my book. Fram has the caveats too, maybe less visible. Severe service is driving in traffic, so that means almost everyone is severe service unless you own your own road. The severe schedule is often skipped in the owner's manuals. IMO the 20K on boxes is bad advertising.
Motorking addressed the capacity of Fram Ultra. That and the synthetic media are two things that allow them to make the 20,000 mile claim.
Fram Ultra Synthetic capcity
I will be changing mine at 3,750 during warranty, not because the filter cannot do more.
I have used MK's 1 gram per 1000 miles probably a dozen times on here trying to show the multipass test loads the filter in four hours, while it would be 300-400 hours in the real world. So a filter with slower filtering sections in it could actually be a more efficient filter over time than a winner in the multi pass test. Like a bypass filter. Only MK said is 1g./1000, here he says even the worst engines. That is pretty doubtful, given there are millions of cases out there. I think that was an error of speech, or writing.
The proof is also on filter boxes and the websites that the stated mileage figure is not technically correct. They all say UP TO. They also all say follow the owners manual. Why do they say that? Because the 20 K is stated to sell the filter. I say that is bad advertising. It's not a slam, bad advertising is everywhere all the time. It's not that complicated or unusual what I am saying.
Here is what should be on a box, to me:
1. grams of dirt holding for the filter size in the box.
2. can thickness in 1/1000's in., or "mils"
3. shelf life indoors, an expiration date
4. pressure drop, restriction, when new
5. bypass opening psi
6. efficiency single pass, multi pass, and ideally by real use test.
Do you think Purolator could write "up to" any smaller?
