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#4631470 - 01/11/18 01:01 PM Blotter Spot Test Procedure
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
I want to start perfoming blotter spot tests every 500 miles to see how the oil is perfoming on my car, I know that this kind of test canīt replace a UOA but I want to start getting used to this kind of test so I can know when a specific oil brand is performing worse than others.

What procedure should I use? Can I use printer paper or should I use a thicker paper? Should I perform the test when the engine is at operating temp or cold?

I want to learn how to do this test in as accurately as I can.

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#4631474 - 01/11/18 01:07 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
UncleDave Online   content


Registered: 06/02/14
Posts: 1636
Loc: Ca.
buy a premade test - they are cheap and use tested paper.

If you don't do this comparisons will be meaningless unless you use the exact same paper and light sources every test.

You could use a stack of the same business cards

I always did it hot per the instructions in the kits - they being the debris kept in suspense will tend to fall out making a cold sample look better than a hot one.

how much it matters - hard to say.


UD


Edited by UncleDave (01/11/18 01:10 PM)
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#4631511 - 01/11/18 01:40 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
Donald Offline


Registered: 03/21/04
Posts: 20450
Loc: Upstate NY
White coffee filter
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#4631513 - 01/11/18 01:41 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
UncleDave Online   content


Registered: 06/02/14
Posts: 1636
Loc: Ca.
too porous


UD
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Cat 3126/2 MB3500/Titan/RX400H/17 Ridgeline
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#4631599 - 01/11/18 03:19 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
Char Baby Offline


Registered: 05/25/05
Posts: 10018
Loc: ROCHESTER, NY
I've always heard here at Bob's that, 3x5 index cards were ideal.


Edited by Char Baby (01/11/18 03:20 PM)
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#4631762 - 01/11/18 06:39 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
zeng Offline


Registered: 09/01/15
Posts: 2187
Loc: Malaysia
I've played around with business cards, newsprint and A4 size letter head paper and 70gm printing paper.
Currently settle at printing paper, 80 gm would work as well I suppose.

I did it hot(after more than 30 minutes drive) , as the blotter 'spreads' better and starting off at say 5000 km,followed by every other 1500/2000 km interval frequencies.

Check out on some reading sites here from members within the thread.
Blotter spot test is free and easy. It helps me in qualitative aspect.


Edited by zeng (01/11/18 06:41 PM)

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#4631830 - 01/11/18 08:06 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
yesthatsteve Offline


Registered: 06/27/11
Posts: 722
Loc: Kansas City, MO
With my last car I used a pack of perforated sheets of blank business cards for printers. Tore off a new card every time I took a sample. After the sample set up, I wrote the date the mileage and the oil/filter combination on the card. Then they went in a binder with plastic business card pages so I could compare over time and test extending OCIs.

I may start doing the cards again once the Buick's out of factory warranty next year and the Honda's oil consumption TSB expires at 125k miles. Right now, I just check the levels once a month and call it good.
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#4631848 - 01/11/18 08:35 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
tig1 Online   content


Registered: 01/03/09
Posts: 13657
Loc: Illinois
I do the one drop test at about 8K into a 10K OCI. I use the back of my welding business cards.

http://www.gwrauto.com/One%20Drop.htm


Edited by tig1 (01/11/18 08:37 PM)
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M1 ATF and MC LV
M1 10-30 in all OPE
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#4631883 - 01/11/18 09:03 PM Re: Blotter Spot Test Procedure [Re: Donald]
blupupher Offline


Registered: 08/27/04
Posts: 4420
Loc: Katy, Republic of Texas
Originally Posted By: Donald
White coffee filter

I did not like it when I tried them (the red circle is a drop of fresh oil to compare to).


and 3 days later:


Originally Posted By: Char Baby
I've always heard here at Bob's that, 3x5 index cards were ideal.

That is what I use now.
I had tried business cards, but some cards have a funny coating on them, and a pack of 3x5 cards is cheap and leave space to write info on it if you want too.
_________________________
1994 Honda VT1100C: Peak 15w-40/TG/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI


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#4636943 - 01/16/18 04:36 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
This are the results using 75 g/m2 printing paper, I took the sample 15 minutes after the engine was shutdown at operating temp, I let the drop dry for 2 days. The oil is 1725 miles old by the way.




What do you think about using this kind of paper? Could a different paper give me better results?

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#4637008 - 01/16/18 05:46 PM Re: Blotter Spot Test Procedure [Re: Emanuel]
Silk Offline


Registered: 07/26/03
Posts: 4552
Loc: New Zealand
I rip the lid off the oil filter carton and use that.
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1987 BMW R65 - Penrite V Twin 20/50
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