15k mile oil changes?
02-06-2007, 10:47 AM
#12
Banned
Join Date: Dec 2005
Location: Lil' Rhody
Posts: 22,376
RE: 15k mile oil changes?
ORIGINAL: 92cobra
ah but our old sloppy 302s will give there lil foriegn pos a run for there money....until were found on the road dead lol and there still driving lol
ah but our old sloppy 302s will give there lil foriegn pos a run for there money....until were found on the road dead lol and there still driving lol
02-06-2007, 04:27 PM
#15
4th Gear Member
Join Date: Feb 2006
Location: Seattle, WA
Posts: 1,375
RE: 15k mile oil changes?
ORIGINAL: ttocs
you don't work for autozone do ya? you sound just like the guy I talked to. As you said it was not all that more expensive, If it lasted to 7-10k it seemed like it was worth the extra cost....
you don't work for autozone do ya? you sound just like the guy I talked to. As you said it was not all that more expensive, If it lasted to 7-10k it seemed like it was worth the extra cost....
ORIGINAL: vristang
The Mobil 1 high mileage oil isn't much more than regular Mobil 1.
The difference will be in the quality and quantity of the additive package.
The additives in the high mileage will be formulated for higher change intervals.
Yes, 15k mile oil change intervals can be realized.
Todays dino oils could probably be changed at 5k miles with no problems.
If you have metal particles of any significance in your oil, then changing the oil more often is not going to make your motor last longer...
Bad logic there.
Just because the oil isn't being changed, doesn't mean the filter shouldn't be changed.
Still change the filter at 3k miles, and top off oil level.
If you are concerned then send oil samples out at 3k, 4k, 5k, 6k, and so on. Oil analysis isn't all that pricey. If you do it for the first oil change, it will give you a good idea of how often you need to change your oil.
Personally, I plan to use standard Mobil 1, with a filter change every 3k miles and full oil change every 6k miles.
I don't feel there is ANY risk in doing this.
In the 'olden days' (when leaded fuels were still in use), 3k miles was all you could get out of quality oil. Even the cheapest oils on the shelf today are far superior to those oils.
We have stuck with the 3k mile change out of habit, and it does benefit the oil companies.
my thoughts
jason
The Mobil 1 high mileage oil isn't much more than regular Mobil 1.
The difference will be in the quality and quantity of the additive package.
The additives in the high mileage will be formulated for higher change intervals.
Yes, 15k mile oil change intervals can be realized.
Todays dino oils could probably be changed at 5k miles with no problems.
If you have metal particles of any significance in your oil, then changing the oil more often is not going to make your motor last longer...
Bad logic there.
Just because the oil isn't being changed, doesn't mean the filter shouldn't be changed.
Still change the filter at 3k miles, and top off oil level.
If you are concerned then send oil samples out at 3k, 4k, 5k, 6k, and so on. Oil analysis isn't all that pricey. If you do it for the first oil change, it will give you a good idea of how often you need to change your oil.
Personally, I plan to use standard Mobil 1, with a filter change every 3k miles and full oil change every 6k miles.
I don't feel there is ANY risk in doing this.
In the 'olden days' (when leaded fuels were still in use), 3k miles was all you could get out of quality oil. Even the cheapest oils on the shelf today are far superior to those oils.
We have stuck with the 3k mile change out of habit, and it does benefit the oil companies.
my thoughts
jason
There is no way you could get me to work in the automotive industry, especially in sales...
Odds are the autozone guy is just regurgitating the sales brochure Mobil 1 handed to him. (but I am admittedly cynical with regards to the knowledge of parts store clerks).
I've done some reading, in college and in the last couple years since college.
Oil technology is nothing like it used to be.
Neither are crankcase evac systems.
Neither is fuel quality.
All you guys that change your oil every 2k miles -
Have you ever done an oil analysis to confirm that the 2k change interval is required?
I've never felt the need for an analysis myself, but I may do it just to shut some of you guys up
If I think about it when I get home maybe I'll post some reading for you guys...
jason
02-06-2007, 05:04 PM
#17
6th Gear Member
Join Date: Sep 2005
Location: Hamilton, NJ
Posts: 15,042
RE: 15k mile oil changes?
I wouldnt trust it... and like posted above you still need to change the filter. And if your going to change the filter you mid as welljust pull one bolt and change the oil.RP every 3K FTW! 
02-06-2007, 10:04 PM
#18
4th Gear Member
Join Date: Feb 2006
Location: Seattle, WA
Posts: 1,375
RE: 15k mile oil changes?
It has nothing to do with the time/effort needed to pull the drain plug...
After spending as much as I have on my 410w, I am going to use the best oil I can reliably get my hands on.
Around here that is Mobil 1.
At $6/qt, I need to buy 7qt for my Canton T-pan.
A Mobil 1 or K&N oil filter is another $10.
It takes $51 to change the oil.
Standard Mobil 1 should be good for 5k miles on a primarily street car.
With a filter change at 2,500 miles, my average oil cost is $62/5k miles.
If I spend the extra $1.50 for the extended mileage oil (which is gauranteed for 15,000 miles), and still change the oil at 10k miles just to be 'safe', then my average cost would be $95/10k miles.
Or $47/5k miles.
If I changed the oil at 2,500 miles (I chose 2,500 miles because some have claimed to change their oil at 2k miles, and it will make the math easier for my retarded @$$), then my cost would be $104/5k miles.
So by extending the oil change interval, I can decrease my oil change expense by (104-47) $57/5k miles.
I realize that $57 over a 5k mile period isn't very much.
But what I actually ask myself is "What am I buying with that $57?"
The only answer that fits is...
"Conformity to a standard that was developed in the 60's, for 1960's technology."
The clearances on a reasonably healthy 5.0 are not going to be that much different than the clearances on a new 3valve 4.6l.
The primary reason Ford starting recommending lower viscosity oils for ALL of its vehicles, was for fleet emissions levels.
It had little to do with engine clearances.
Here are a couple of links that I have found to be informative...
http://www.bobistheoilguy.com/
http://people.msoe.edu/~yoderw/oilfi...lterstudy.html
http://people.msoe.edu/~yoderw/oilfi...ilfilters.html
http://www.trustmymechanic.com/motor-oil-bible.pdf
After this thread I have decided to sign up for some oil testing.
I will get some results as soon as the motor is running in a stable manner...
hopefully by the end of March,
jason
After spending as much as I have on my 410w, I am going to use the best oil I can reliably get my hands on.
Around here that is Mobil 1.
At $6/qt, I need to buy 7qt for my Canton T-pan.
A Mobil 1 or K&N oil filter is another $10.
It takes $51 to change the oil.
Standard Mobil 1 should be good for 5k miles on a primarily street car.
With a filter change at 2,500 miles, my average oil cost is $62/5k miles.
If I spend the extra $1.50 for the extended mileage oil (which is gauranteed for 15,000 miles), and still change the oil at 10k miles just to be 'safe', then my average cost would be $95/10k miles.
Or $47/5k miles.
If I changed the oil at 2,500 miles (I chose 2,500 miles because some have claimed to change their oil at 2k miles, and it will make the math easier for my retarded @$$), then my cost would be $104/5k miles.
So by extending the oil change interval, I can decrease my oil change expense by (104-47) $57/5k miles.
I realize that $57 over a 5k mile period isn't very much.
But what I actually ask myself is "What am I buying with that $57?"
The only answer that fits is...
"Conformity to a standard that was developed in the 60's, for 1960's technology."
The clearances on a reasonably healthy 5.0 are not going to be that much different than the clearances on a new 3valve 4.6l.
The primary reason Ford starting recommending lower viscosity oils for ALL of its vehicles, was for fleet emissions levels.
It had little to do with engine clearances.
Here are a couple of links that I have found to be informative...
http://www.bobistheoilguy.com/
http://people.msoe.edu/~yoderw/oilfi...lterstudy.html
http://people.msoe.edu/~yoderw/oilfi...ilfilters.html
http://www.trustmymechanic.com/motor-oil-bible.pdf
After this thread I have decided to sign up for some oil testing.
I will get some results as soon as the motor is running in a stable manner...
hopefully by the end of March,
jason
