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#1692035 - 12/02/09 05:03 AM Oil Change Intervals May Shorten
The Critic Offline


Registered: 08/30/04
Posts: 18723
Loc: Walnut Creek, CA
Quote:
He said industry will also need to take into account the fuel economy that vehicles achieve after oil is installed in an engine – not just the score that fresh oil achieves on an engine test. As oil ages in an engine, fuel economy decreases. Friction modifiers and other chemistries are depleted, the oil thickens due to oxidation and accumulation of soot.

Formulation can delay this decrease in performance, McCabe said, but only so much. To sustain fuel economy improvements, drain intervals may need to be shortened.

“As fuel economy deteriorates over time, there comes a point when swapping an old oil for a new one becomes the best approach to better fuel economy,” he said. “It is hard to say what the optimum point is, as it varies by engine and cycle. But the overall trend is there: The longer a drain interval, the more fuel economy will deteriorate.”


http://www.imakenews.com/lng/e_article001579661.cfm?x=bgct1JL,blqdw92
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92 Previa - 160k - Chevron 5w30/Wix

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#1692046 - 12/02/09 05:21 AM Re: Oil Change Intervals May Shorten [Re: The Critic]
BobFout Offline


Registered: 03/23/09
Posts: 2880
Loc: Indiana
With the right oil that's a non-issue. Europeans have been going much longer than us on intervals, and they're OCD on MPG.
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2003 VW Jetta TDI (Sold) / 2015 VW GTI 2.0T

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#1692049 - 12/02/09 05:26 AM Re: Oil Change Intervals May Shorten [Re: BobFout]
The Critic Offline


Registered: 08/30/04
Posts: 18723
Loc: Walnut Creek, CA
Originally Posted By: BobFout
With the right oil that's a non-issue. Europeans have been going much longer than us on intervals, and they're OCD on MPG.


I don't think the Euros have CAFE...
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11 Prius - 129k - M1 EP 0w20/OE
07 Accord 2.4 - 111k - M1 5w20/FPS Filter
10 Altima 3.5 - 34k - M1 EP 5w30/FU
92 Previa - 160k - Chevron 5w30/Wix

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#1692059 - 12/02/09 05:46 AM Re: Oil Change Intervals May Shorten [Re: The Critic]
mechanicx Offline


Registered: 10/23/09
Posts: 8576
Loc: Ohio
I just have a hard time believing mileage drops that much to cover the cost of the more frequent oil changes. It kind of like someone saying synthetic will pay for it's self with gas mileage increase alone. I doubt it. And we have some very credible sources saying oil reduces friction after 3k miles of use. And I'm saying this as a person who favors shorter OCI.

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#1692065 - 12/02/09 06:05 AM Re: Oil Change Intervals May Shorten [Re: mechanicx]
Shannow Offline


Registered: 12/12/02
Posts: 32761
Loc: Oz
Got to get those big wheels turning again..whatever it costs.
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#1692077 - 12/02/09 06:33 AM Re: Oil Change Intervals May Shorten [Re: The Critic]
finnautti Offline


Registered: 08/03/09
Posts: 49
Loc: Finland
Originally Posted By: The Critic
Originally Posted By: BobFout
With the right oil that's a non-issue. Europeans have been going much longer than us on intervals, and they're OCD on MPG.


I don't think the Euros have CAFE...
But we have high fuel and oil prices.

Only thing i see shortening OCI is the increasing use of ethanol in fuel.

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#1692078 - 12/02/09 06:37 AM Re: Oil Change Intervals May Shorten [Re: The Critic]
Pablo Offline


Registered: 10/28/02
Posts: 46943
Loc: Duvall WA - Pacific NW USA
Quote:
Mike McCabe, regional business manager for engine oils at Lubrizol

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#1692082 - 12/02/09 06:40 AM Re: Oil Change Intervals May Shorten [Re: The Critic]
BobFout Offline


Registered: 03/23/09
Posts: 2880
Loc: Indiana
Originally Posted By: The Critic
Originally Posted By: BobFout
With the right oil that's a non-issue. Europeans have been going much longer than us on intervals, and they're OCD on MPG.


I don't think the Euros have CAFE...


No, but at $5 to $9/gallon, we'd be wise to see what they are doing. I'm sure they have their own CAFE-like stuff.

From wiki: "The United States and Canada have the weakest standards in terms of fleet-average fuel economy rating among first world nations, e.g. 25 mpg in the U.S. versus 45 mpg in the European Union and higher in Japan (2008)"

http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy

Who can learn from who? LOL
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#1692092 - 12/02/09 06:53 AM Re: Oil Change Intervals May Shorten [Re: BobFout]
mechanicx Offline


Registered: 10/23/09
Posts: 8576
Loc: Ohio
I don't think there's anything to learn. They are driving a lot more smaller cars with smaller engines, turbos and manual transmissions. No big secret that will cause higher gas mileage.

They also have perhaps different fuel and emissions regulations. For instance, they use diesel more, maybe don't formulate gasoline for emissions as much, might have different guidlelines for fuel trim tuning. For instance cars in the US run richer at stoichiometric than best lean economy mixture due to emissions, catylist and the EPA and whoever else's setting the regulations.

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#1692108 - 12/02/09 07:17 AM Re: Oil Change Intervals May Shorten [Re: mechanicx]
Captain_Klink Offline


Registered: 05/29/09
Posts: 610
Loc: Afghanistan
what? nothing to learn? now i know why we are in so much trouble.


Edited by Captain_Klink (12/02/09 07:18 AM)

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#1692129 - 12/02/09 08:06 AM Re: Oil Change Intervals May Shorten [Re: mechanicx]
opus1 Offline


Registered: 12/13/04
Posts: 2245
Loc: Chicago Area
Originally Posted By: mechanicx
I don't think there's anything to learn. They are driving a lot more smaller cars with smaller engines, turbos and manual transmissions. No big secret that will cause higher gas mileage.

They also have perhaps different fuel and emissions regulations. For instance, they use diesel more, maybe don't formulate gasoline for emissions as much, might have different guidlelines for fuel trim tuning. For instance cars in the US run richer at stoichiometric than best lean economy mixture due to emissions, catylist and the EPA and whoever else's setting the regulations.


In addition, they can drive smaller vehicles due to less stringent crash requirements than cars here have to meet -- why do people think we can't get those microcars here?

And let's not forget their mass-transit systems help to minimize their need for personal vehicles. I take the train to work, but still have to drive to the station. There is a bus service available from the regional authority, but I have to drive 3 miles to get to the stop. That's halfway to the station for me. In addition, the authority runs the bus only 3-4 times morning and evening, and if you miss the bus, you're SOL. So what's my incentive to use the service?

But I'm getting off-topic here. As to the original post, I find it ironic that anyone is even considering this....think about it; more frequent oil changes = more oil use. And why are we doing this? To help us conserve fuel, which is made from.....oil.

A prime example of why one should feel chills down their back whenever they hear "I'm from the government and I'm here to help you....".
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#1692148 - 12/02/09 08:27 AM Re: Oil Change Intervals May Shorten [Re: opus1]
Burt Offline


Registered: 01/08/09
Posts: 1235
Loc: texas
I think any minor fuel efficiency gain is partially offset by fuel used to drive the car to get the oil or the oil changed, dispose of the used oil and have it recycled. Shortening the OCI by 1000 miles to improve MPG 1% saves 0.4 gallons if you get 25 mpg. If you drive the equivalent of 10 miles to get the oil changed, you use up the benefit of the savings.
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#1692169 - 12/02/09 08:47 AM Re: Oil Change Intervals May Shorten [Re: Pablo]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5457
Loc: Durango, Co
Originally Posted By: Pablo
Quote:
Mike McCabe, regional business manager for engine oils at Lubrizol


Exactly. Lengthening of North American Oil Change intervals is thretening the old business model.
_________________________
Integrity is what we do when no one's looking.

2010 FJ Cruiser
Mobil 1 0w20 10k mile or 1 year WECF OCI's
2012 BMW F30 with the new N20
Tbd

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#1692171 - 12/02/09 08:48 AM Re: Oil Change Intervals May Shorten [Re: Burt]
addyguy Offline


Registered: 09/08/05
Posts: 13851
Loc: Canada
"But I'm getting off-topic here. As to the original post, I find it ironic that anyone is even considering this....think about it; more frequent oil changes = more oil use. And why are we doing this? To help us conserve fuel, which is made from.....oil."

BUT, if the oil is re-cycled properly, that loss is minimized.
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2010 Kia Soul 2U - 2.0L I-4, auto, 85k miles.
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#1692186 - 12/02/09 09:02 AM Re: Oil Change Intervals May Shorten [Re: addyguy]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5457
Loc: Durango, Co
nO TRANSPORT COST EAT US ALIVE.
_________________________
Integrity is what we do when no one's looking.

2010 FJ Cruiser
Mobil 1 0w20 10k mile or 1 year WECF OCI's
2012 BMW F30 with the new N20
Tbd

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