Who was it who mentioned Fram oil filters and dropping oil pressure?
in [Toyota]
|
Prev: The Most Powerful Natural Penis Enlargement Technique >><<
Next: Replace oxygen sensor even if check engine light does not come on
From: jim on 14 Dec 2009 08:00 dr_jeff wrote: > > Please tell me how a mechanic is supposed to know the organic chemistry, > metallurgy and engineering in determining how often the oil needs to be > changed. That never was the question. Here is the quote "As a car ages, more frequent changes might be in order, but that's for a qualified mechanic to decide on a case-by-case basis." Modern oils hold the fine dirt particles that the oil filter do not remove in suspension. But oil can only hold so much dirt. If you change oil often enough the oil changes get rid of the dirt. If you don't change the oil as often them some of the dirt will stay in the engine. If every oil change you leave some dirt in the engine it adds up. This does not require a Ph.D. to comprehend. Examining an old car and determining whether the engines oil needs to be changed more frequently is not the intractable and difficult proposition that you are making it out to be. > > If very think, chunky oil is coming, obviously, the interval is too > long. However, please explain what kind of knowledge base a good > mechanic has that let's him/her determine the proper interval better > that is better than the one recommended by the car maker. I have seen plenty of examples where car manufacturers provide recommendations to mechanics in one form or another to examine the oil and engine to determine if the oil has been changed as often as it should be. Typically this sort of advice comes in service bulletins that are intended to help diagnose engine noises like valve train clatter. More often than not these descriptions do not go into any particular detail of how the mechanic is to make such a analysis. It is assumed that a competent mechanic can tell the difference between a clean engine and one that is not. -jim
From: jim on 14 Dec 2009 08:47 "C. E. White" wrote: > Changing oil too often is not cheap insurance if there is no benefit. > You don't seem to quite grasp the concept of insurance. Is buying fire insurance stupid for those who are among the vast majority that never collect a benefit? -jim
From: hls on 14 Dec 2009 09:12 "Ashton Crusher" <demi(a)moore.net> wrote in message > You can spend your own money any way you want but there is no factual > basis for your claim that such frequent oil changes are any benefit. > You are still living in the world of 1960 oil. As I have said earlier, the book says 5000, less under severe conditions. The two different dealerships I have bought from recommend 3500. It is a small price to pay,and I am content with it.
From: hls on 14 Dec 2009 09:22 "Vic Smith" <thismailautodeleted(a)comcast.net> wrote in message news:r96bi5pjcgt4ttc7q97ojpl21nkqte197k(a)4ax.com... > 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 Our 1998 Buick LeSabre actually had a reset button in the glove compartment area. There were occasions it came on at less than 3500 miles, but not often. I have heard the GM algorithm strongly defended as far as its ability to predict oil change intervals, but like most everything else in this entire thread, there is no hard proof that I have ever seen. I am sure these studies must exist, on filters, oil change intervals, effect of particulates of different size distributions in the oil, etc etc, but I have never seen them. (And I HAVE looked for them)
From: SMS on 14 Dec 2009 09:40
hls wrote: > > "Ashton Crusher" <demi(a)moore.net> wrote in message >> You are wasting a ton of money and oil. With today's high quality >> regular oil, unless you have some crappy sludge producing import >> engine, every 6mo/6000 miles is all you need. > > Depends on your goals. If you want the minimum upkeep, and you > run the vehicles a relatively short time, and then just want to auction > them > off, you are probably right. > > If you want to maintain your warranty and run the car for 8-10 years and > 100K or more, then you do what the manufacturer says, or better. > > At least, that seems logical to me. > > Oil is damn cheap compared to an engine. Then you should be changing your oil every 100 miles. It will have the same benefit on the longevity of the engine versus changing the oil every 1000 miles, 3000 miles, or 5000 miles--no effect at all. But it'll make you feel better. "Recreational Oil Changing The term "recreational oil changer" was coined to define people that change their oil far more than necessary because they actually enjoy doing it. It's easy to understand the psychology behind the recreational oil changing. It's the visceral feel of the tools, the victory when that old oil filter breaks free, the hot dark oil pouring out, the joy of oiling of the gasket on the new filter, that new copper or fiber gasket on the drain plug, the clean clear oil going in, and the sense of accomplishment when you start the car, the oil pressure light comes on for a moment, then goes out. For $8-10 in oil and parts, it's pretty cheap entertainment, but if people would be content to do it only when it provides some benefit to the vehicle it would be better." |