dirty oil is good for your engine!?! - Team Camaro Tech
Engine General Engine Discussion.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 41 (permalink) Old Feb 7th, 05, 09:23 AM Thread Starter
Tech Team
 
Join Date: Jan 2004
Posts: 51
Post

This is going to get interesting, I think. Our area's premiere auto repair facility, no longer believes in, or promotes, or will do, frequent (3000-5000) mile oil changes. They are advising their customers to go up to, or beyond 15,000 miles. They only change the filters now.They say they have the latest technical data and it shows that the longer the oil stays in your engine, the better it is for it. Again, this is not a fly-by-night shop, rather one that has been here many, many years, with highly trained techs, that command VERY premium prices for their services.. So what's your opinions?
nothinbuttaillights is offline  
Sponsored Links
Advertisement
 
post #2 of 41 (permalink) Old Feb 7th, 05, 09:41 AM
Senior Tech
Steve
 
67 Convertible's Avatar
 
Join Date: Oct 2004
Location: Hudson, MA
Posts: 1,501
Post

It's hard for me to believe that they would refuse to change my oil after 3,000 miles. After all, they're in business to make money and I'm a paying customer. Aside from that, even if shown proof, I'd have my doubts. We've been told for years of the viscosity breakdown of old oil. If you get 150k-200k out of a motor by changing the oil every 3-4k miles, are they saying I can get 300k-400k by only changing it every 15-20k ?? Again, I have my doubts. I'll keep changing my daily drivers every 3k and the Camaro every 700 to 800 miles.

'67 Marina Blue Convertible. L30, PG. All numbers match, 41k original miles.

"The only time you have too much fuel, is when you're on fire"
67 Convertible is offline  
post #3 of 41 (permalink) Old Feb 7th, 05, 09:57 AM
Senior Tech
Al
 
Join Date: Nov 2002
Location: Vancouver, USA
Posts: 10,511
Post

Ditto. I'd be leery of leaving synthetic in that long, as well. Crap gets past the rings, into the oil, synthetic or regular.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BPOS is offline  
 
post #4 of 41 (permalink) Old Feb 7th, 05, 09:57 AM
 
Join Date: Oct 2004
Posts: 777
Post

Ditto on 67 convertable's post. What are you talking 30.00 dollars tops.I do my car and my wifes truck for that every 3000 miles religously.I do the work myself though.
georgia 69 is offline  
post #5 of 41 (permalink) Old Feb 7th, 05, 10:17 AM
Senior Tech
Matt Jones
 
Join Date: Jan 2002
Location: Renton, WA USA
Posts: 2,765
Post

The viscosity breaks down, period. End of story. Hydrodynamic film bearings have a SPECIFIED and NECESSARY oil viscosity depending on bearing clearances.

If that bearing film, which is directly related to viscosity, is too thin, the bearing's load carrying capacity is reduced. If your bearing clearances specify SAE 30 and you use SAE 10, you get accelerated bearing wear. This is an industry accepted concept, not just car engines. Lathes, machine tools, etc all follow this.

I would ask for the data and the number of samples. If only 5-10 samples were used for the test, I'd call BS. If there are 5000 samples, then they could be on to something; the oil companies sure wouldn't want everybody to know about it.

Matt Jones
Lead Mechanical Engineer
Art Morrison Ent. Inc.
Silver69Camaro is offline  
post #6 of 41 (permalink) Old Feb 7th, 05, 10:46 AM
Senior Tech
Tom
 
Join Date: May 2001
Location: Socorro, New Mexico, USA
Posts: 574
Send a message via MSN to kausboy
Post

I run synthetic in my daily driver and go up to 6,000 miles on an oil change. It is primarily run on the interstate and I have been told synthetic can be run up to 10,000 miles! 6k makes me nervous but it comes out clean and I have noticed no adverse effects.
kausboy is offline  
post #7 of 41 (permalink) Old Feb 7th, 05, 11:07 AM
Senior Tech
 
Join Date: Dec 2001
Location: Fairfield, CA
Posts: 6,246
Post

Here's a treatise on when to change oil:

http://neptune.spacebears.com/cars/s.../interval.html

"For those that will fight for it...FREEDOM ...has a flavor the protected shall never know."
Semper Fi! L/Cpl Edwin L. "Tim" Craft, B Co 3rd AT's, Khe Sanh Combat Base, February, 1968
onovakind67 is offline  
post #8 of 41 (permalink) Old Feb 7th, 05, 11:31 AM Thread Starter
Tech Team
 
Join Date: Jan 2004
Posts: 51
Post

The reason they won't change your oil at 3k is they are a "care care" type facility, which means, in their words, "we want to take complete care of your car, we want to have you as a life-long customer, we want to make sure what we do to your car improves it's long-term life, and we won't have you spend money foolishly". In other words, when you bring your car to them, you get their brand of service. They are not a "speedy-lube" type facility. They do have some of the leading edge techs, and the owner is really into preventive maintanence, and no throwing your money away. His facility is one of our better "accounts", so next time I see him I am going to ask him on what studies and tests he is basing his oil changing on.
nothinbuttaillights is offline  
post #9 of 41 (permalink) Old Feb 7th, 05, 11:44 AM
Senior Tech
 
Join Date: Dec 2001
Location: Fairfield, CA
Posts: 6,246
Post

And another q & a:

http://neptune.spacebears.com/opine/3koil.html

"For those that will fight for it...FREEDOM ...has a flavor the protected shall never know."
Semper Fi! L/Cpl Edwin L. "Tim" Craft, B Co 3rd AT's, Khe Sanh Combat Base, February, 1968
onovakind67 is offline  
post #10 of 41 (permalink) Old Feb 7th, 05, 12:04 PM
 
Join Date: Dec 2003
Posts: 353
Post

IMO, all this 3,000 mile crap started when the "speedy lube" places were thrown up everywhere. I believe if a quality oil is used, then a 3,000 mile interval is definately premature. Of course, it depends on driving conditions etc. For normal highway driving I change my oil every 5,000 miles and my engines last with no major problems caused by excessive wear.
The Camaro gets an oil change about every 3 - 5 months because of the amout of time it sits. As far as mileage, it probably gets an oil change every 200 miles [img]smile.gif[/img] . I Don't think it needs it, just havin fun underneath the classic!
Z10Joey is offline  
post #11 of 41 (permalink) Old Feb 7th, 05, 01:13 PM
Senior Tech
Kevin
 
Join Date: Feb 2003
Location: Beverly Hills Fl.
Posts: 586
Post

I change all mine around 3000 miles, although I've heard several different opinions. Anyway, what will it hurt to change it after 3000 miles? Wouldn't that be like getting to much fresh air? (The better the oil is the quicker it'll get dirty.) Does this company rebuild engines? Kevin
KRhat is offline  
post #12 of 41 (permalink) Old Feb 7th, 05, 01:20 PM
Senior Tech
 
Join Date: Jun 2003
Location: Tampa, FL
Posts: 957
Post

For what it's worth, BMW recommends oil changes every 15,000 miles or 1 year.
Neil B is offline  
post #13 of 41 (permalink) Old Feb 7th, 05, 02:03 PM
 
Join Date: Sep 2004
Posts: 491
Post

Hi, I work for a car company, and we manufacturers are constantly trying to extend the service intervals on our vehicles. Customers demand it these days, because if your product costs more to maintain than the competition,you're sunk. Todays aluminum engines dissipate heat better than the tried and true cast iron counterparts,fuel injection cuts down on the fuel contamination/breakdown of the lube, and oil now is just plain better than it was in the past, with the addition of synthetics and other additives. The bottom line is, the manufacturers provide a warranty on new cars using LONG oil change service intervals of 10k or more. This would not and could not be done if engines were seizing under warranty,since it would cost the companies millions of dollars in repairs to customer's cars. Its going to take a LONG time to have this kind thinking take root. As for me, I STILL change the oil in all of our vehicles every 3000 miles no matter what. So much for adopting the corporate culture! [img]smile.gif[/img] [img]graemlins/clonk.gif[/img]
Bob Brissie is offline  
post #14 of 41 (permalink) Old Feb 7th, 05, 02:24 PM
Senior Tech
Don
 
ZZ_430's Avatar
 
Join Date: May 2001
Location: Houston, Texas
Posts: 4,491
Post

nothinbuttaillights, I like to see names and places.

Where is this "area"?

Don ~ TC Member #15 ~
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Don't mess with Texas!
ZZ_430 is offline  
post #15 of 41 (permalink) Old Feb 7th, 05, 03:15 PM
Gold Lifetime Member
Jim
 
Join Date: Dec 1999
Location: Yorkville, Illinois USA
Posts: 22,121
Post

Since they started putting smart oil monitors in, I've used them. I drive my truck 30k a year, so maintenance costs are an issue with me. The monitor gives me 75-8500, and I take every mile of it.

The Camaro, on the other hand, gets 2 oil changes a year (1000-1500 miles each)





To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
New website for my vert is coming together. Do ya like the slide show on the home page?
JimM is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome