From: Tegger on
"Jeff Strickland" <crwlrjeff(a)yahoo.com> wrote in
news:hf9lta$s1m$1(a)news.eternal-september.org:

>
> "Tegger" <invalid(a)invalid.inv> wrote in message
> news:Xns9CD6C658FA8C2tegger(a)208.90.168.18...

>>
>> If you trade your car well before it hits 150,000 miles, it probably
>> doesn't matter what oil you use or how often you change it. If you
>> plan on keeping the car until it dies, minor differences in long-term
>> maintenance regimen are more likely to make major differences in
>> engine longevity. I'm going to play it safe, even if it means giving
>> more money than I need to to
>> those evil, money grubbing oil companies.
>>
>
>
> Do what you want, but you're wasting oil and money.
>
> Oil is a limited resource, you should extend your oil change interval
> to 5000 miles for no other reason than saving oil. I'm surpirsed that
> the idiots over at GreenPeace aren't screaming at JiffyLube, et al,
> for continuing to recommend a 3000 mile change interval. The
> automakers have been honoring the warranty on a 7500 mile interval for
> about 15 years now.



The "warranty" generally expires after 100,000 miles or less. It's of no
help at all to those, like me, who take engines to three or four times that
mileage.

We have proven crude oil reserves for the next 200 years. At least. I'm not
particularly worried about running out of it.


--
Tegger

From: dr_jeff on
Devil's Advocate wrote:
> Isnt regular oil, the kind they do these quick oil changes with, supposed
> to be good for up to 10,000 miles, even though they recommend changing it
> every 3000?
>
> I had a mechanic today, try to sell me "longer distance" oil instead and
> it sounded like BS, being I have it changed every 3000.

You need to use good quality motor oil, like Valvoline. And how long it
is good for is easy to determine. Read your owner's manual. The
engineers know a lot more about maintaining the engine than a bunch of
strangers on the internet.

So, if your owner's manual says you should use 5W-20 motor oil and
change it every 5,000 mi, then use good-quality 5W-20 motor oil that
meets the vehicle maker's specs, and change it every 5000 mi. And if the
manual says, change it every 5000 mi, then change it every 5000 mi, not
at 3000 mi.

As far as the longer distance oil, you can use synthetic like Mobil1,
and change it every 10,000 mi.

As to how good the mechanic's advice was, we can't tell without knowing
the year, make, model, mileage, brand of oil that you usually put in,
and the brand and type of oil recommended by the mechanic.

jeff
From: James Patterson on
>
> As to how good the mechanic's advice was, we can't tell without knowing
> the year, make, model, mileage, brand of oil that you usually put in, and
> the brand and type of oil recommended by the mechanic.
>


I agree! I tend to adjust the oil changes based on how the oil looks when
it is drained. I have a '98 windstar and the oil is *BLACK* after 3,000
miles. I have a '88 supra and the oil still looks like new at 7,500 miles.
As a result I change the oil in the windstar at 3000 with the cheapest oil I
can find. The supra gets synthetic since I tend to change it a lot less
frequently.

From my understanding, it is the contaminants in the oil that cause wear,
not the oil wearing out. Differences in engine design and how tight the
tolerances can make a big difference in how long the oil lasts.


From: Ron Peterson on
On Dec 3, 8:58 pm, "James Patterson" <j...(a)yahoo.net> wrote:

> From my understanding, it is the contaminants in the oil that cause wear,
> not the oil wearing out.  Differences in engine design and how tight the
> tolerances can make a big difference in how long the oil lasts.

There are detergents and other additives to oil that deteriorate with
use.

Synthetic oils such as Mobil One are supposed to have less friction
increasing the gas milage, but the cost of the synthetics may make it
a non-issue.

--
Ron
From: SMS on
dr_jeff wrote:

> Really? Based on what evidence? And how are you playing it safe? By
> taking a bigger risk that a mechanic or yourself will get a defective
> filter or that the oil drain or filter will be left loose and you will
> run without oil for a while?

That's a good point. Too frequent oil changes can be as bad as too
infrequent oil changes.