How is everyone managing maintenance and oil analysis over time?

[Rhox91]

I've been doing the maintenance on my family's vehicles for years now. Oil analysis has been on my radar for a while and I can see why it could be useful for wear trends over time etc. From what I understand though, the reports are usually just pdfs?

How are you handling the storage/management of those reports though? Do you guys just keep a folder of them on your computer and compare them manually? Or maybe a custom spreadsheet or an app? Something else?

Also wondering if you track those reports alongside regular maintenance records (ex. drain intervals, mileage at drain, what was in the engine). Seems to me that having that record alongside the report would matter for interpretation. Trying to figure out what a manageable system would look like, while actually being able to maximize the benefit of paying for the oil reports, so any tips or advice appreciated!

 

[dnewton3]

used oil analysis are often misused because folks misunderstand their value and their risks.

Read this article:
https://bobistheoilguy.com/used-oil-analysis-how-to-decide-what-is-normal/

There are some ways used oil analysis can be very useful:
- single used oil analysis can be of benefit; typically when they indicate a very unique or unexpected level of some metal reading (bearing going bad, timing chain guide wear, etc)
- a long series of used oil analysis can be used to understand "normal" behavior (see article above) when proper statistical analysis is applied
- single used oil analysis can also indicate when some system has run afoul; such as contamination intrusion (silica; coolant; etc)

Unfortunately, most of the time, people use singular used oil analysis as a tool to compare/contrast different lubes, and in the process, come to some VERY bad conclusions. Almost as if they are using a hammer to cut a 2x4 board. used oil analysis cannot be used in this manner. So just be cautious you don't fall into this trap.

used oil analysis are great tools, but they are not perfect tools, nor are they the right tool for every job.

 

[jetman]

Oil Analyzers Inc & eoilreports.com & me myself & I with an electronic logbook/word precessing doc, & my post here on BITOG all keep track of things. I also print them and keep a paper folder on each vehicle.
Here is what I'm talking about for my Toyota that I've had for 16+ years:

Thread 'Valvoline Restore and Protect, 5w-30, 5k oci, Toyota 4.0L 1GRFE'

Jul 8, 2025

2007 Toyota FJ Cruiser 4.0L 1GRFE gasoline v6 w/237k miles. I've owned it since Jan 2009. It's never consumed any oil and it didn't this time either. Still on the full mark when I drained it.

out and off = 6.5 qts Valvoline Restore and Protect 5w30, Purolator Boss PBL30001 full flow filter, and Amsoil EaBP90 bypass filter.

in and on = 6.5 more qts of Valvoline Restore and Protect, and new EaBP90 bypass filter, and a new Fleetguard LF3487 full flow filter. This is my forever oil for this vehicle, and I'll stick to 5k oci.

Sample#1 - Dec 2010 = AMSOIL Signature Series 0w30 - oci 17,000...

• jetman
• Replies: 35
• Forum: Used Oil Analysis - Gasoline

• 
• 

 

[wwillson]

Take a look at my Durango used oil analysis spreadsheet. Like @dnewton3 said, be careful not to use oil analysis for what it wasn't intended. My Durango used oil analysis didn't show increased iron when the rocker roller bearing was eating itself and the filter was full of metal. Look at the Sept 11, 2025 sample



https://bobistheoilguy.com/forums/t...a-oil-filter-full-of-metal-bad-rocker.399622/

 

[SevenBizzos]

Excel sheet for old cars. Ford Pass app for newer.

 

[shortyb]

Ask @TiGeo .

 

[KrisZ]

No need for used oil analysis unless in very specific applications/circumstances.

 

[wwillson]

No need for used oil analysis unless in very specific applications/circumstances.

Or if doing used oil analysis is interesting enough to you.

 

[TiGeo]

Excel. Easy. I suppose you could feed these into one of the AI engines (.pdf works I think?) and have it spit it out however you want.

 

[TiGeo]

I've been doing the maintenance on my family's vehicles for years now. Oil analysis has been on my radar for a while and I can see why it could be useful for wear trends over time etc. From what I understand though, the reports are usually just pdfs?

How are you handling the storage/management of those reports though? Do you guys just keep a folder of them on your computer and compare them manually? Or maybe a custom spreadsheet or an app? Something else?

Also wondering if you track those reports alongside regular maintenance records (ex. drain intervals, mileage at drain, what was in the engine). Seems to me that having that record alongside the report would matter for interpretation. Trying to figure out what a manageable system would look like, while actually being able to maximize the benefit of paying for the oil reports, so any tips or advice appreciated!

I use Blackstone so they keep all those .pdfs for you. I can go to their site/my account and get any of my reports over the last 8 years for any of my cars. I'm sure the other oil analysis vendors do the same. You don't need to make it complicated, again, Excel is super easy to key these in. You really only are looking at a few things - you can see what is critical (to me at least) in my table above.

 

[ARB1977]

When comes time to sell. The average Joe isn’t going to understand used oil analysis. If I’m going spend money on a used oil analysis. I should spend the money on an oil change instead. Why stress about spread sheets and what not.

 

[TiGeo]

When comes time to sell. The average Joe isn’t going to understand used oil analysis. If I’m going spend money on a used oil analysis. I should spend the money on an oil change instead. Why stress about spread sheets and what not.

Because science man. Plus gives me crap to post here

 

[ARB1977]

Because science man. Plus gives me crap to post here

. That’s why I love this forum.

 

[TiGeo]

. That’s why I love this forum.

I think I mispelled "to fight about here" HAHA.

 

[Rhox91]

used oil analysis are often misused because folks misunderstand their value and their risks.

Read this article:
https://bobistheoilguy.com/used-oil-analysis-how-to-decide-what-is-normal/

There are some ways used oil analysis can be very useful:
- single used oil analysis can be of benefit; typically when they indicate a very unique or unexpected level of some metal reading (bearing going bad, timing chain guide wear, etc)
- a long series of used oil analysis can be used to understand "normal" behavior (see article above) when proper statistical analysis is applied
- single used oil analysis can also indicate when some system has run afoul; such as contamination intrusion (silica; coolant; etc)

Unfortunately, most of the time, people use singular used oil analysis as a tool to compare/contrast different lubes, and in the process, come to some VERY bad conclusions. Almost as if they are using a hammer to cut a 2x4 board. used oil analysis cannot be used in this manner. So just be cautious you don't fall into this trap.

used oil analysis are great tools, but they are not perfect tools, nor are they the right tool for every job.

I appreciate this breakdown and I think this is the direction I would lean. A focus on long term trends vs. product comparison for an Amsoil vs. Royal Purple type debate. More of a "I want to know my vehicle" vs. let me try to optimize my diff oil selection haha (though that can be fun too).

Thanks for laying this out so clearly.

 

[Rhox91]

Oil Analyzers Inc & eoilreports.com & me myself & I with an electronic logbook/word precessing doc, & my post here on BITOG all keep track of things. I also print them and keep a paper folder on each vehicle.
Here is what I'm talking about for my Toyota that I've had for 16+ years:

Thread 'Valvoline Restore and Protect, 5w-30, 5k oci, Toyota 4.0L 1GRFE'

Jul 8, 2025

2007 Toyota FJ Cruiser 4.0L 1GRFE gasoline v6 w/237k miles. I've owned it since Jan 2009. It's never consumed any oil and it didn't this time either. Still on the full mark when I drained it.

out and off = 6.5 qts Valvoline Restore and Protect 5w30, Purolator Boss PBL30001 full flow filter, and Amsoil EaBP90 bypass filter.

in and on = 6.5 more qts of Valvoline Restore and Protect, and new EaBP90 bypass filter, and a new Fleetguard LF3487 full flow filter. This is my forever oil for this vehicle, and I'll stick to 5k oci.

Sample#1 - Dec 2010 = AMSOIL Signature Series 0w30 - oci 17,000...

• jetman
• Replies: 35
• Forum: Used Oil Analysis - Gasoline

• 
• 

I see, got it covered from multiple angles. I'll need to check out the thread on your Toyota, 16 years with no oil consumption is a great run! Oil Analyzers is a new one to me. Do you trend their reports in the spreadsheet/logbook based on the data per interval? Or is it easy enough to just keep the mental reference from report to report?

 

[Rhox91]

Take a look at my Durango used oil analysis spreadsheet. Like @dnewton3 said, be careful not to use oil analysis for what it wasn't intended. My Durango used oil analysis didn't show increased iron when the rocker roller bearing was eating itself and the filter was full of metal. Look at the Sept 11, 2025 sample



https://bobistheoilguy.com/forums/t...a-oil-filter-full-of-metal-bad-rocker.399622/

Well that's a pretty powerful example that UOA isn't a guarantee, just another data point. When in doubt, check the filter out hah! So do you have those spreadsheets separate from your regular maintenance log? Or are they combined so that you have all the data grouped for easy reference?

 

[Rhox91]

Excel. Easy. I suppose you could feed these into one of the AI engines (.pdf works I think?) and have it spit it out however you want.

View attachment 328575
View attachment 328576

*whistle* what a spreadsheet! The per 1k callout is nice, and I saw that in the how to decide what's normal thread that got shared by dnewton3.

Are the reports easy enough to pull into excel? Are you typing those in manually with every report, or do you have way to easy import?

 

[wwillson]

Well that's a pretty powerful example that UOA isn't a guarantee, just another data point. When in doubt, check the filter out hah! So do you have those spreadsheets separate from your regular maintenance log? Or are they combined so that you have all the data grouped for easy reference?

I keep a separate word document for maintenance history.

 

[TiGeo]

*whistle* what a spreadsheet! The per 1k callout is nice, and I saw that in the how to decide what's normal thread that got shared by dnewton3.

Are the reports easy enough to pull into excel? Are you typing those in manually with every report, or do you have way to easy import?

Just type it. It take about a minute....