Automakers Lengthen Oil Change Intervals
in [Cars]
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From: C. E. White on 2 Apr 2007 13:27 "TE Chea" <4ws(a)gmail.com> wrote in message news:460e9bf8_1(a)news.tm.net.my... >| reading reports years ago (annoyingly difficult to find > | on the 'net) about the interrelationship between oil age and > | wear > www.aa1car.com/library/how_often_change_oil.htm ? Larry Carley is probably a fine fellow, but he is also a car care industry insider. And the article includes some factual errors. All current Toyotas specify 5000 mile oil changes. They don't include a severe service schedule (see http://smg.toyotapartsandservice.com/owners.php ). Most current Ford specify 5000 mile oil changes (a few specify 7500 mile oil changes). Ford does provide a severe service schedule (3000 mile oil changes), but Mr. Carley's article overstates when it should be applied. The GM oil life indicators have different settings for car that come from the factory with synthetic oil. The owner's guides warn you that you can't use the oil life indicator if you use conventional oil in car than came from the factory with synthetic oil, but then they also tell you to use synthetic oil in those vehicles. GM vehicles that come from the factory with conventional oil (most GM vehicles) have oil life monitors that are set to provide the correct oil change interval for conventional oil. Current Honda have also gone to a variable "Maintenance Minder." Older Hondas had 7500 mile normal service intervals with a 3750 severe schedule. Honda says: "The "normal" schedule is fine for most drivers, even if they occasionally drive in severe conditions." I love the link to the Valvoline study. Sort of like George Bush asking members of the RNC how he is doing. Ed
From: clare at on 30 Mar 2007 23:59 On Fri, 30 Mar 2007 22:43:35 -0500, "Steve Barker" <ichasetrains(a)some.yahoo.com> wrote: >Not a troll. And I've used straight 30 in a fleet of 33 trucks for 10 years >now. Some of them have over 300,000 miles. If the vehicles never need to be started in cold temperatures there is nothing wrong with straight 30 weight oil. I would not recommend it for normal "consumer" use but it definitely has it's place. Irrigation pumps which run 24 hours a day on natural gas can run significantly longer on a straight grade oil than a broad range multi-grade. Condensation is not an issue, natural gas burns very cleanly so carbon contamination is not a problem, and if it is low sulphur gas, there is very little acid buildup in the oil. 1000 hours of running under THESE conditions is nothing on a straight grade detergent oil. I know of some old 318 Chrysler industrial engines, and old "Y" block ford industrials(292 and 312)as well as FE style Fords that would run all season on two changes, and ran for years. 1000 hours is equivalent to 60,000 miles at 60mph and is just over a month of 24 hour days. Multigrade oils would be suffering shear breakdown long before this. On a gasoline or deisel engine, I would never consider this. On wellhead gas, I would never consider this. On pipeline gas, it has been done for years. One application where I would NOT use multigrades, as there is no upside to doing so, and considerable downside. -- Posted via a free Usenet account from http://www.teranews.com
From: clare at on 30 Mar 2007 22:55 On 31 Mar 2007 02:37:14 GMT, Roger Blake <rogblake10(a)iname10.com> wrote: >In article <460DB54C.D2950A10(a)hotmail.com>, Eeyore wrote: >> Exactly. > >Actually on the older Saab engines, the thermostat is a 3-position jobbie. >The intermediate position just lets water circulate in the cylinder head >and heater. It's important to use the correct OEM replacement since some >of the aftermarket units don't have the correct functionality. Called a "bypass" thermostat. -- Posted via a free Usenet account from http://www.teranews.com
From: John Henderson on 2 Apr 2007 18:57 RCE wrote: > http://neptune.spacebears.com/cars/stories/mobil1.html Thanks for the link. While the testing is done on synthetic oil, it goes a long way to demolishing the myth that "you can't change oil too often". As they say in the above link: "Engine wear actually decreases as oil ages. This has also been substantiated in testing conducted by Ford Motor Co. and ConocoPhillips, and reported in SAE Technical Paper 2003-01-3119. What this means is that compulsive oil changers are actually causing more engine wear than the people who let their engine's oil get some age on it." John
From: RCE on 2 Apr 2007 19:18
"John Henderson" <jhenRemoveThis(a)talk21.com> wrote in message news:57dg30F2cdbbrU1(a)mid.individual.net... > RCE wrote: > >> http://neptune.spacebears.com/cars/stories/mobil1.html > > Thanks for the link. While the testing is done on synthetic > oil, it goes a long way to demolishing the myth that "you can't > change oil too often". As they say in the above link: > > "Engine wear actually decreases as oil ages. This has also been > substantiated in testing conducted by Ford Motor Co. and > ConocoPhillips, and reported in SAE Technical Paper > 2003-01-3119. What this means is that compulsive oil changers > are actually causing more engine wear than the people who let > their engine's oil get some age on it." > > John I found this sentence to be particularly interesting also: "Indeed, one is forced to wonder whether an engine with a high-quality PAO synthetic combined with a bypass filtration system and regular filter changes would ever need its oil changed at all." RCE |