Automakers Lengthen Oil Change Intervals
in [Cars]
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From: HLS on 29 Mar 2007 20:28 "John Henderson" <jhenRemoveThis(a)talk21.com> wrote in message > But I suppose the above will go straight over your head if > you're mind's already made up. Like you, I'm retired too. But > I do make an attempt to keep up. > > John I believe you have submitted sufficient verbage to show that your mind is also made up. As I said before, it is your car- do what you like with it.
From: HLS on 29 Mar 2007 20:30 "Big Shoe" <j_shoe.removethis(a)yahoo.com> wrote in message > One thing that seems obvious - people selling oil changes make more > money if you change more often. Naturally they will recommend > changing as often as they can get away with. I'm really dating myself > now, but well remember when standard change was every 1,000 miles. And there was a time that engine life was very limited, no matter how often you changed. I restate my original point. There has been no hard data submitted on this tediously long thread that one could use to make an intelligent decision. Therefore, you do what you want to do.
From: Eeyore on 29 Mar 2007 19:45 HLS(a)nospam.nix wrote: > I quote from this report > "On the basis of our test results, we think that the commonly recommended > 3,000-mile oil-change interval is conservative" > > I am very conservative. > > They also found no difference in performance between synthetics and > petroleum refined oils. > Not too surprising to me. No ? It sounds barking mad to me. Graham
From: John Henderson on 29 Mar 2007 19:56 HLS(a)nospam.nix wrote: > I believe you have submitted sufficient verbage to show that > your mind is also made up. Not at all. I subscribe to "comprehensively critical rationalism". I make my decisions on the best evidence available at the time. It was reading reports years ago (annoyingly difficult to find on the 'net) about the interrelationship between oil age and wear which lead to my present position. I'll change my mind in the face of credible evidence to the contrary. > As I said before, it is your car- do what you like with it. Thank you. Most of the cars I service aren't mine, but some people trust my judgement (for what that's worth). John
From: SMS on 29 Mar 2007 20:20
Eeyore wrote: > > HLS(a)nospam.nix wrote: > >> I quote from this report >> "On the basis of our test results, we think that the commonly recommended >> 3,000-mile oil-change interval is conservative" >> >> I am very conservative. >> >> They also found no difference in performance between synthetics and >> petroleum refined oils. >> Not too surprising to me. > > No ? It sounds barking mad to me. These were not high performance engines. There is really no advantage at all to synthetics used in "normal" engines, except in extremely cold weather. Also, remember that they compared the cab using synthetic at 12,000 miles, versus the petroleum based oil at 6000. In that sense, assuming that the petroleum based oil could not have lasted 12,000 miles, there was an advantage to synthetic in the extended change interval. What is ludicrous is people that use synthetic oil, in non-high performance engines, in mild climates, and still change it every 5000 miles. This is an absolute waste of money, with no benefit to the engine at all. Once the vehicle's warranty is done, using synthetic and extending the change interval to 10,000 miles from 5000 miles at least gives you some return on your money, though filters should still be changed every 5000 miles. Remember, even Mobil 1 and Amsoil are only semi-synthetic. They use synthetic base stock but then add petroleum based carrier oil. |