XPost: alt.home.repair   
   From: am@yellowjersey.org   
      
   On 3/25/2021 3:01 PM, Jim Joyce wrote:   
   > On Thu, 25 Mar 2021 22:35:05 +0530, mike  wrote:   
   >   
   >> On 25-03-2021 13:08  wrote:   
   >>   
   >>> Once it gets in the bottle it is the same as far as API is concerned.   
   >>   
   >> I agree with you that oil is a commodity which people obsess about.   
   >> Mostly because advertisers want to give people something to obsess about.   
   >>   
   >> Every brand is different but those differences won't matter much to us.   
   >>   
   >> What matters mostly is how often we change it (IMHO).   
   >> Which itself matters mostly based on our weather & driving patterns (IMHO).   
   >>   
   >> And even that is subject to a lot of personal opinion (IMHO).   
   >> Everyone makes their own assessment of what to use & when to change (IMHO).   
   >>   
   >> (My personal opinion is twice a year for dino & once a year for synth).   
   >> (My personal opinion is a filter change roughly about once a year.)   
   >   
   > I'm curious. If you're going to go to the trouble of changing the oil twice   
   > a year, why not change the filter twice a year, as in, doing both at the   
   > same time? It seems like only a small increment of extra work and expense.   
   >   
      
   It's vestigial from the 1950s when oil and labor were cheap   
   and filters were expensive. No good reason now, certainly   
   not any technical reason. I changed to oil with new filter   
   every 3K miles in the 1970s.   
      
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