Who was it who mentioned Fram oil filters and dropping oil pressure?
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From: Ashton Crusher on 13 Dec 2009 20:35 On Sun, 13 Dec 2009 20:18:03 -0500, "C. E. White" <cewhite3(a)mindspring.com> wrote: > >"Vic Smith" <thismailautodeleted(a)comcast.net> wrote in message >news:ga3bi5to666iv7beavqlo38trchhjt88rl(a)4ax.com... >> On Sun, 13 Dec 2009 18:55:42 -0600, jim <"sjedgingN0Sp"@m(a)mwt,net> >> wrote: >> >> >>> >>> Here is a question for you to ponder. How is the "qualified mechanic" >>>going to determine if the little blue haired lady's car needs more >>>frequent oil changes? >> >> Is the Jiffy Lube guy a "qualified mechanic?" >> How about the "qualified mechanic" whose business is slow? >> I think she's gonna need more frequent oil changes. > >I like the GM system for determining oil change intervals. It is not >perfect, but it does at least attempt to modify oil change intervals to >compensate for varations in the vehicle usage. I had a Saturn that used it. >I never actually waited until the oil change light came on, but with the >light providing a stop point, I felt a lot better about extending the oil >change interval. > >For most of my life I have been a 3000 mile oil change guy. But after seeing >how well things went for people I know who change at longer intervals, I >decided to go for longer intervals as well. I figure for everything I own, >5000 miles is a good interval. > >Changing oil too often is not cheap insurance if there is no benefit. > >Ed Now that you mention the GM system.... My 95 Caprice had that in it. We changed the oil, per our fleet policy, every 6000. The oil change light came on almost always about 500 to 1000 miles sooner, IF it came on at all, between resets/oil changes. So based on that I'd say the GM algorithm came pretty close to calling for a 6000 mile interval.
From: jim on 13 Dec 2009 21:01 dr_jeff wrote: > > What you're making is a straw man argument. No you are. The question wasn't how often does it need to be changed but has it in the past been changed often enough. That question is usually easy to answer. > You have yet to explain how > a mechanic is supposed to know how often to change oil. Yes. And I'm not going to. >It is obvious > when there is a bunch of sludge in the engine that it should have been > more often. But you haven't said how to determine how often.
From: Vic Smith on 13 Dec 2009 21:05 On Sun, 13 Dec 2009 20:18:03 -0500, "C. E. White" <cewhite3(a)mindspring.com> wrote: > >"Vic Smith" <thismailautodeleted(a)comcast.net> wrote in message >news:ga3bi5to666iv7beavqlo38trchhjt88rl(a)4ax.com... >> On Sun, 13 Dec 2009 18:55:42 -0600, jim <"sjedgingN0Sp"@m(a)mwt,net> >> wrote: >> >> >>> >>> Here is a question for you to ponder. How is the "qualified mechanic" >>>going to determine if the little blue haired lady's car needs more >>>frequent oil changes? >> >> Is the Jiffy Lube guy a "qualified mechanic?" >> How about the "qualified mechanic" whose business is slow? >> I think she's gonna need more frequent oil changes. > >I like the GM system for determining oil change intervals. It is not >perfect, but it does at least attempt to modify oil change intervals to >compensate for varations in the vehicle usage. I had a Saturn that used it. >I never actually waited until the oil change light came on, but with the >light providing a stop point, I felt a lot better about extending the oil >change interval. > I don't know how that determines a change is due. The manual says it could come on in as little as 2000 miles - or less!, depending on some "conditions" mentioned - speed, temp, etc. My son does my oil changes, and I suppose he could have reset it at some point. I'll have to ask him, but I don't think he ever reset it. The manual is vague, only saying that it should be reset after changing the oil, but not specifying that the light actually on requires the reset. Reset is key in run, engine off, push accelerator to floor 3 times quickly, and light should blink twice and go out. Anyway, the light is on now and has been since we got back from Florida a couple months ago. We changed the oil before we left, and only put about 3000 miles on it before the light came on. First time I ever saw it, but since my wife is its main driver, I'm not sure if was on before. --Vic
From: dr_jeff on 13 Dec 2009 21:36 jim wrote: > > dr_jeff wrote: > >> What you're making is a straw man argument. > > No you are. The question wasn't how often does it need to be changed but > has it in the past been changed often enough. That question is usually > easy to answer. No, the argument with the picture of the sludge-filled engine is part of a straw-man argument. >> You have yet to explain how >> a mechanic is supposed to know how often to change oil. > > Yes. And I'm not going to. Correct, because a mechanic is not supposed to know how to determine how often to change the oil independently, but, rather, follow the manufacturer's recommendations. Jeff >> It is obvious >> when there is a bunch of sludge in the engine that it should have been >> more often. But you haven't said how to determine how often.
From: jim on 13 Dec 2009 21:55
dr_jeff wrote: > > jim wrote: > > > > dr_jeff wrote: > > > >> What you're making is a straw man argument. > > > > No you are. The question wasn't how often does it need to be changed but > > has it in the past been changed often enough. That question is usually > > easy to answer. > > No, the argument with the picture of the sludge-filled engine is part of > a straw-man argument. No the picture is extreme example of the point I was making. Anyhow, if the engine is clean the oil has been changed often enough and if it isn't then it hasn't. > > >> You have yet to explain how > >> a mechanic is supposed to know how often to change oil. > > > > Yes. And I'm not going to. > > Correct, because a mechanic is not supposed to know how to determine how > often to change the oil independently, but, rather, follow the > manufacturer's recommendations. Well maybe if he is brain dead. -jim |