Recent Topics
Throttle sticking and scary
by NavyVet88 - 02/19/20 05:53 AM
New to me “vintage” oil mug
by dlundblad - 02/19/20 04:49 AM
Castrol 0W-20?
by TRDPRO85 - 02/19/20 02:44 AM
What is a dealer prep fee?
by WhyMe - 02/19/20 01:01 AM
Vintage Sinclair promo
by HiPowerShooter - 02/18/20 11:29 PM
why did my Ford iolm go to 9% after 3k miles?
by dogememe - 02/18/20 11:15 PM
HUBB reusable stainless steel filter?
by Vern_in_IL - 02/18/20 08:41 PM
Ultrasonic carb cleaning problems
by atikovi - 02/18/20 08:05 PM
Cheeseburger pie
by P10crew - 02/18/20 07:25 PM
The midwinter detail.
by dan_erickson - 02/18/20 05:27 PM
Tired of Using Cassette Player with iPhone
by Gebo - 02/18/20 05:04 PM
STP oil filter
by Stinky123 - 02/18/20 04:41 PM
How is this possible
by V10 - 02/18/20 04:07 PM
Monroe made in Turkey
by atikovi - 02/18/20 03:31 PM
NSFBitog
by Ursatdx - 02/18/20 03:25 PM
Wider rear tires?
by drop - 02/18/20 03:07 PM
Newest Members
GardenStateAudi, Strommen95, Idaholewis, Sprite, spbonus
70746 Registered Users
Who's Online Now
71 registered members (Astro14, Black_Thunder, Astro_Guy, 97K15004WD, Bailes1992, 9 invisible), 1,281 guests, and 17 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics301,638
Posts5,199,609
Members70,746
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 8 1 2 8
Walmart Oil Change? #5325898 01/18/20 12:50 AM
Joined: Mar 2019
Posts: 223
T
Talent_Keyhole Offline OP
OP Offline
T
Joined: Mar 2019
Posts: 223
The weather was bad in the midwest and my daughter needed an oil change this week in her Honda CR-V, 2.4L.. She normally does it herself with M1 and a Fram Filter.

Below are pictures of the oil before and after the oil change (spill and fill). Yes, the oil and filter was changed. This is not a dig towards Walmart or any other oil change service. Similar results occur even with DIY service.

1. New Oil in a vile.
2. New oil sampled from sump after 15 miles.
3. Blot test of the new oil after 15 miles and a standard oil change.
4. Blot test of new oil from the sump, after a 99% flush after 20 miles in my car.

Blackstone Labs confirmed that in modern engines, up to 20% of oil may remain in an engine.

How much of the serviceability of the oil is reduced by mixing with the old oil?

What impact to the the longer term engine life due to the remaining old oil?

Can that remaining oil last another full OCI?

If not, I assume the oil will oxidize and causing sludge, varnish, and carbon build-up in the engine.


20200117_235524.jpg20200117_235036.jpg20200118_000550.jpg20200118_000517.jpg
Last edited by Talent_Keyhole; 01/18/20 12:51 AM.
Re: Walmart Oil Change? [Re: Talent_Keyhole] #5325900 01/18/20 12:54 AM
Joined: Jan 2019
Posts: 196
J
Jetsfan421 Offline
Offline
J
Joined: Jan 2019
Posts: 196
That oil passes the blot test to me. Run it the whole oci with confidence.

Re: Walmart Oil Change? [Re: Talent_Keyhole] #5325902 01/18/20 12:57 AM
Joined: Aug 2019
Posts: 597
T
tundraotto Offline
Offline
T
Joined: Aug 2019
Posts: 597
You need to worry about new things. Oil is fine.

Re: Walmart Oil Change? [Re: Talent_Keyhole] #5325904 01/18/20 01:00 AM
Joined: Jul 2017
Posts: 1,270
O
OilUzer Offline
Offline
O
Joined: Jul 2017
Posts: 1,270
Experts say tribofilm is good and not to worry ...

Re: Walmart Oil Change? [Re: Talent_Keyhole] #5325908 01/18/20 01:15 AM
Joined: May 2019
Posts: 3,829
M
Mad_Hatter Offline
Offline
M
Joined: May 2019
Posts: 3,829
Originally Posted by Talent_Keyhole

What impact to the the longer term engine life due to the remaining old oil? - I'm sure the engine will last all the way to the tranny giving out, despite remnants of oil changes past.

Can that remaining oil last another full OCI? - sure, it lasted 300 million years in the ground, what's another 6 months?

Re: Walmart Oil Change? [Re: Jetsfan421] #5325921 01/18/20 02:08 AM
Joined: Mar 2019
Posts: 223
T
Talent_Keyhole Offline OP
OP Offline
T
Joined: Mar 2019
Posts: 223
Originally Posted by Jetsfan421
That oil passes the blot test to me. Run it the whole oci with confidence.


Where can I find more information on acceptable blot test criteria?

Re: Walmart Oil Change? [Re: tundraotto] #5325922 01/18/20 02:10 AM
Joined: Mar 2019
Posts: 223
T
Talent_Keyhole Offline OP
OP Offline
T
Joined: Mar 2019
Posts: 223
Originally Posted by tundraotto
You need to worry about new things. Oil is fine.


No issues with the QS conventional new oil. How do you know the old oil is fine?

Re: Walmart Oil Change? [Re: OilUzer] #5325925 01/18/20 02:45 AM
Joined: Mar 2019
Posts: 223
T
Talent_Keyhole Offline OP
OP Offline
T
Joined: Mar 2019
Posts: 223
Originally Posted by OilUzer
Experts say tribofilm is good and not to worry ...


Are you talking about Tribofilms created by Extreme Pressure lubricants such as ZDDP? Please elaborate?

Re: Walmart Oil Change? [Re: Talent_Keyhole] #5325926 01/18/20 02:46 AM
Joined: May 2019
Posts: 3,829
M
Mad_Hatter Offline
Offline
M
Joined: May 2019
Posts: 3,829
Originally Posted by Talent_Keyhole
Originally Posted by Jetsfan421
That oil passes the blot test to me. Run it the whole oci with confidence.


Where can I find more information on acceptable blot test criteria?

There's actually "special" paper i believe..

https://www.machinerylubrication.com/Read/499/blotter-spot-method

Re: Walmart Oil Change? [Re: Mad_Hatter] #5325927 01/18/20 02:53 AM
Joined: Mar 2019
Posts: 223
T
Talent_Keyhole Offline OP
OP Offline
T
Joined: Mar 2019
Posts: 223
Originally Posted by Mad_Hatter
Originally Posted by Talent_Keyhole

What impact to the the longer term engine life due to the remaining old oil? - I'm sure the engine will last all the way to the tranny giving out, despite remnants of oil changes past.

Can that remaining oil last another full OCI? - sure, it lasted 300 million years in the ground, what's another 6 months?



My last two transmissions outlasted engines by two fold due to regular full fluid exchanges, instead of spill and fills.

Your second comment is typical and does not pertain to the question.

Assuming that removing the filter and pulling the drain plug removed 99% of the oil in an engine, would you buy a name brand oil that contained up to 20% used oil of unknown quality, cleanliness, and contains wear metals, and combustion by-products?

Re: Walmart Oil Change? [Re: Mad_Hatter] #5325929 01/18/20 03:10 AM
Joined: Mar 2019
Posts: 223
T
Talent_Keyhole Offline OP
OP Offline
T
Joined: Mar 2019
Posts: 223
Originally Posted by Mad_Hatter
Originally Posted by Talent_Keyhole
Originally Posted by Jetsfan421
That oil passes the blot test to me. Run it the whole oci with confidence.


Where can I find more information on acceptable blot test criteria?

There's actually "special" paper i believe..

https://www.machinerylubrication.com/Read/499/blotter-spot-method


So far standard business card stock seems to work well. I was hoping the article would provide more information such as the "standard comparator" as mentioned.

Do you have access to this comparator?

Re: Walmart Oil Change? [Re: tundraotto] #5325942 01/18/20 04:37 AM
Joined: Jan 2011
Posts: 3,572
L
Lubener Offline
Offline
L
Joined: Jan 2011
Posts: 3,572
Originally Posted by tundraotto
You need to worry about new things. Oil is fine.

+1


The "thinking" man's friend.
Re: Walmart Oil Change? [Re: Talent_Keyhole] #5325950 01/18/20 05:00 AM
Joined: May 2019
Posts: 3,829
M
Mad_Hatter Offline
Offline
M
Joined: May 2019
Posts: 3,829
Originally Posted by Talent_Keyhole
Originally Posted by Mad_Hatter
Originally Posted by Talent_Keyhole
Originally Posted by Jetsfan421
That oil passes the blot test to me. Run it the whole oci with confidence.


Where can I find more information on acceptable blot test criteria?

There's actually "special" paper i believe..

https://www.machinerylubrication.com/Read/499/blotter-spot-method


So far standard business card stock seems to work well. I was hoping the article would provide more information such as the "standard comparator" as mentioned.

Do you have access to this comparator?

I do not but Google blotter spot test and you'll find more than you care to know. At one point I was going to get into this but meh, that idea/motivation was short lived. BITOG member "Zeng" has done this test himself. DM him for first hand deets'...

Last edited by Mad_Hatter; 01/18/20 05:01 AM.
Re: Walmart Oil Change? [Re: Talent_Keyhole] #5325978 01/18/20 06:55 AM
Joined: Feb 2013
Posts: 1,561
S
spk2000 Offline
Offline
S
Joined: Feb 2013
Posts: 1,561
Walmart now does vacuum up the diptstick tube only. So depending on the vehicle some are better suited for this than others. I tried my own vaccum oil out the dipstick tube on my old 93 Honda Civic and could only get 1 qt out. Theirs is probably better than that but you also have to consider who is doing it and are they in a hurry to get to break or off work or finish up so they can sit. You just never know unless you can watch them.


96 Grand Marquis 203,000 mi
01 Sable LS Wagon 163,000 mi
02 Montero 191,000 mi
03 Sable LS Sedan 73,000 mi
Re: Walmart Oil Change? [Re: Talent_Keyhole] #5326008 01/18/20 07:34 AM
Joined: Jun 2003
Posts: 35,257
E
eljefino Offline
Offline
E
Joined: Jun 2003
Posts: 35,257
My dodge 318's dipstick is pretty narrow. Widest tubing I could fit down it was aquarium bubbler tubing. I set up a siphon, with cold oil I drained a quart per day!

A vacuum only has 15 PSI behind it. I don't see that working too much better.

But, hey, I'm not Walmart. Their logistics are pretty good most of the time.

Page 1 of 8 1 2 8
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™