Britt –
I think it’s a little of both. The modern synthetic oils
have improved, the mfr’s are pushing the service intervals because people
don’t want to have to bring their cars in for service often.
Most BMW’s and many other cars (VW/Audi comes to mind)
have gone to full synthetic oil for the last 10 years or so. This helps to
prolong the maintenance interval.
That being said, some mfr’s have had problems with oil
sludging in their engines. VW/Audi had a service campaign where they were
replacing long blocks well past the warranty period if the owner could prove
that service (oil changes) were performed at the recommended intervals.
Several other makes were affected by this problem as well. I
know Toyota was one, I don’t recall the others.
I think the reality lies somewhere between the old school 3,000
miles, and the extended intervals that are being recommended. If you buy a new
car and only plan to keep it 3-4 years or up to about 100,000 miles you will
probably have no problems following either the mfr’s service schedule or
the computer that tells you when it is time to change the oil.
But, if you plan to keep the car longer and expect it to make it
to the 200,000 mile mark or beyond, I feel more frequent oil changes will help
achieve that goal.
The BMW service indicator primarily keeps track of fuel
consumed, and bases the interval on this. Figuring more fuel will be consumed
in traffic, short trips, etc, and less on pure highway driving.
Also, most service schedules have a footnote regarding ‘severe’
use. Although the word ‘severe’ may not be the correct term,
probably 80-90% of owners fall into this category which calls for more frequent
oil changes.
Theoretically, they say you can go 15,000 miles between oil
changes with synthetic. Personally I feel more comfortable with half that, but
that’s me.
From: Britt2Asa [at] aol.com
[mailto:Britt2Asa [at] aol.com]
Sent: Monday, September 20, 2010 11:25 AM
To: Jeff Greenfield
Cc: ferrari [at] ferrarilist.com
Subject: Re: [Ferrari] NY Times on frequency of oil changes
I find this quite interesting. I was working in the fleet business
when I moved to the UK in 1995. Immediately Inoticed that cars here would
require an oil change every 7500 miles while in the US at the time it was
normal every 3000 miles. That slowly grew to be around 10k-12k miles or once a
year by 2000. This was for the majority of cars here.
The blonde's 2002 BMW petrol engine had a computer that determined
servicing. It lit the service light at around 12k miles. The car never used
more than 1qt oil every 12k miles and after 100k miles was still perfect. She
now has a 2003 3 series with the same engine and it has similar requirements.
My 530d BMW clicked on the service light at around 20,000 miles.
My current new 320d just had its first service at 23,000 miles. I wonder what
BMW requires in the USA regarding oil changes on these same engines?
Either the oil companies/service garages are lying about the need
for frequent oil changes or the car manufacturers are pushing up the miles
between oil changes to make their cars more appealing here in what is a very
competitive market.
Interesting read.
Vty,
--Dennis
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NY TIMES
September 10, 2010
The 3,000-Mile Oil Change Is Pretty Much History
By ALINA TUGEND
I STILL remember learning from my father how to carefully remove a dipstick
to check the oil level in our cars. It was drilled into me - along with
turning off the lights when you left a room and clearing the plates off the
table after dinner - that oil needs to be changed every 3,000 miles or so.
I'm not sure what I thought would happen if I didn't, but I vaguely imagined
an unlubricated engine grinding to a halt.
Childhood habits are hard to undo, and that's often good. To this day, I
hate seeing an empty room with the lights on.
But sometimes, we need to throw aside our parents' good advice. In March,
for example, I wrote about how we should relearn the dishwasher and laundry
soap habits we inherited from our mothers.
Add frequent oil-changing to that list.
"There was a time when the 3,000 miles was a good guideline," said
Philip
Reed, senior consumer advice editor for the car site Edmunds.com. "But
it's
no longer true for any car bought in the last seven or eight years."
Oil chemistry and engine technology have improved to the point that most
cars can go several thousand more miles before changing the oil, Mr. Reed
said. A better average, he said, would be 7,500 between oil changes, and
sometimes up to 10,000 miles or more.
The California Integrated Waste Management Board ran public service
announcements for several years about "the 3,000-mile myth," urging
drivers
to wait longer between oil changes. Although the information is a few years
old, the board has a list of cars on its Web site and how often they need
oil changes. The concern is not only the cost to drivers, but the
environmental impact of throwing away good oil, said Mark Oldfield, a
recycling specialist for the agency.
But the situation is not that clear cut, according to Robert Sutherland, a
Pennzoil scientist who works at Shell Global Solutions.
Rather than picking a number, Mr. Sutherland said, he recommends following
what your owner's manual advises. I checked the manual for our 2007 Mazda5
and had to determine if my typical driving included a lot of stop-and-go
driving, short distances, extended idling, muddy, rough or dusty roads or
really humid or cold temperatures.
Hmm. Yes, to short distance and stop and go. So that meant I should get the
oil changed every 5,000 miles. If I did a great deal of longer-distance
highway driving, it would be every 7,500.
The different types of driving are usually known as severe and mild (which
is also sometimes called normal), Mr. Sutherland said, which seems
counterintuitive since most of us probably don't think we drive in severe
conditions. But we do.
The reason, he said, is that if you take a trip of less than 10 miles or so,
the engine and the oil are not completely warmed up. And if the oil is still
cool, he said, it cannot absorb the contaminants that come from internal
combustion as efficiently.
"It's designed to work best when fully warmed up," Mr. Sutherland
said. "If
you're running to the music lesson, to school, the gym, that's severe
driving conditions."
Mr. Sutherland said he has a mild commute. "It's 47 miles, all
highway."
What actually happens if you don't change your oil? Well, it doesn't run
out, it simply gets dirtier and dirtier. It's like mopping the floor with a
bucket of water and detergent. The water starts out clean, but the more you
use it, the filthier it gets. Eventually, you're making the floor dirtier if
you don't change the water.
Some people remain attached to the 3,000-mile oil change and have a hard
time trusting the recommendations in the owner's manual. If you're one of
those skeptics, you can send your engine oil out to be analyzed. Blackstone
Laboratories in Fort Wayne, Ind., one of the best-known places for engine
oil analysis, will send you a free kit.
You send back an oil sample and for $25, they'll tell you all sorts of
things about your car.
"We would compare what your oil looks like compared to the average Mazda5
of
that year," said Kristen Huff, a vice president at Blackstone. If there is
a
lot more lead in my oil than in a typical Mazda5, for example, it means I
have a bearing problem, she said.
Her lab runs about 150 samples a day and a fair percentage of those are
consumers looking to find out how often they need to change their oil, Ms.
Huff said.
"Very often, it is the case that they're changing their oil too
often," she
said. "They do what their dad did with his '55 Chevy."
Another way to get a more accurate assessment of your oil needs is to buy a
car that has a maintenance minder, like a Honda. A light on the dashboard
alerts the driver when the system judges that the oil has only 15 percent of
its useful life remaining. The time between oil changes varies depending on
the driver and driving conditions.
Honda has used such maintenance minders on most models for at least the last
five years, said Chris Martin, a Honda spokesman. Previously, the owner's
manual suggested changes every 10,000 miles in mild conditions and 5,000
miles in severe conditions.
Still, some people stick to the 3,000-mile changes, because "the Jiffy
Lubes
of the world have done a good job convincing people," Mr. Martin said
It's not just the fast oil change outlets. My sticker from my trusted
mechanic states that I'll need a change in 3,000 miles or three months. But
Jiffy Lube, the largest quick oil change company in North America, is now
under pressure to change its automatic 3,000-mile recommendation.
For about a year, the company has run a pilot program with some franchises
across the country suggesting that instead of a blanket recommendation,
mechanics tell customers what the manufacturer recommends under mild or
severe driving conditions.
"By this time next year, every Jiffy Lube will do it," said Rick
Altizer,
president of Jiffy Lube International. And the little sticker on your
windshield will no longer simply state when the next oil change should
occur, but, "I choose to change my oil" at a specific mileage.
"It's so it's not some arbitrary technician saying this," Mr. Altizer
said,
but the consumer's decision.
Mr. Reed of Edmunds.com said car owners often got conflicting messages
because of an inherent tension: "The car manufacturers want the reputation
that it makes cars that last a long time. The dealership wants to see you
every three months."
But he acknowledged that "3,000 miles strikes a deep chord with the
consumer," adding: "It feels good to get an oil change. If you fill
up the
car with gas, wash it and change the oil, it runs better. Of course, it
doesn't. But it's the perception."
Although Mr. Reed is doubtful that most drivers fall into the severe driving
category and fears mechanics will use that to push drivers into paying for
more oil changes than necessary, Mr. Sutherland said he wouldn't want "to
second-guess the manufacturer." Vehicles, he said, "are a substantial
investment and changing fluids is how you protect that investment."
So before you go in for your oil change, dig out your owner's manual and see
what it says. And when the mechanic slaps on a sticker that gives the next
change date in 3,000 miles, ask questions. And then, go get the car washed.
That's one thing that always seems to be needed.
BR in the UK
1986 328GTS (LHD 89,940km) Died August 19, 2006 Shrewsbury UK
1980 400i (RHD 74,000 miles)
Searching for the right 512TR
1997 Fiat Barchetta
1985 Bertone X1/9
2003 BMW 530d
1991 Alfa Spider S4 LHD
1993 Alfa Spider S4 LHD
2010 BMW 320d
|
acme-ltd.com)