XPost: alt.home.repair   
   From: this@address.is.invalid   
      
   On 26-03-2021 19:05  wrote:   
      
   > Bear in mind, the manufacturer would be perfectly happy if the car   
   > blew up the day after the warranty expired. Then you would have to buy   
   > another one. I am sure the intervals for old cars should be shorter   
   > than a new one if oil contamination was your main issue. More stuff   
   > will get by the rings for one thing.   
   > OTOH people who always drive old cars don't really care.   
      
   Even so for anyone to claim oil filters wear at exactly the same rate the   
   oil wears is just proving they don't understand there are oils that are   
   "longer lasting" and there are filters that are "longer lasting" (just as   
   their are oils and filters that are shorter lasting and conditions matter).   
      
   They're completely different things (oil & filters) with different specs.   
   And they're made completely differently and they also wear differently.   
      
   Every manufacturer has a maintenance table for when to check/change things.   
   In addition, each manufacturer of oil & filters does things differently.   
      
   There are a lot of oil specs out there to consider   
   SAE 0W20, 0W30, 0W40, 5W30, 5W40, 10W30, 10W40, 15W50   
   ACEA A1/B1, A5/B5, A3/B4 A5/B5-10, A5/B5-12   
   API SN, SN Plus, SN-RC, SM, SL, SP   
   BMW LL-01   
   Chrysler MS 6395   
   FIAT 9.55535-H2, FIAT 9.55535-M2, FIAT 9.55535-N2   
   Ford WSS-M2C153-H, WSS-M2C929-A, WSS-M2C930-A, WSS-M2C945-A, WSS-M2C946-A,   
   WSS-M2C947-A   
   GM-Opel LL B-025   
   GM 4718M, 6094M, LL-A-025, dexos1 Gen 2, Gen 3   
   Honda HTO-06   
   ILSAC GF-5, GF-4, GF-3   
   MB-Approval 229.5   
   Porsche A40   
   Renault RN0700, RN0710   
   VW 502 00 - 505 00   
      
   And there are a lot of oil filter teardowns where I've dremeled open many of   
   my own oil filters & I even used to send out my oil for testing years ago.   
      
   If you ask me what I base my oil filter change intervals on I'm going to   
   answer that I base intervals on things other than just money & convenience.   
   (1) I look at filter pleating, surface area, micron spec, edge glue & seam   
   (2) I look at the size and thickness & antidrainback valve material   
   (3) I especially check the type of overpressure valve (some don't exist!)   
   (4) I pick at the mating gasket to see if it tends to easily fall off   
   (5) I check the inlet holes for the number and overall diameter   
   (6) I like to look for the mating threads machined from the outside in   
   (7) I like filter cans that are 20 & 30 thou rather than 15 thousandths   
   (8) I look at the type of oil that I'm putting in and the type of driving   
      
   It's fine for him to claim that he only cares about money & convenience.   
   He can change his oil filter on any interval he wants and that's OK with me.   
      
   But if he asks me why I follow the manufacturer recommendations then he's   
   going to get more of an answer than just money & convenience specifically   
   because neither is what I use to determine my oil filter change interval.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)