8 replies to this topic

[Alberto]

Figured it would be useful to have a consolidated oil analysis thread where we can post up test results and compare results.


Posting up the results of 2 oil analysis I had done over the course of the 2011 racing season.

Oil used was Redline 30 weight racing oil. Not their street oil.

The engine is a stock street engine with about 90k miles on it. Before this season, it was in a street car running street oil. The first sample seems to show some of the additive package of the street oil.

It is really surprising just how low the viscosity was after as little as 2-3 race weekends which included Double Regional SCCA races.

Comments welcome. Have other people experienced with quick of a break down on Redline oils?



First oil analysis test result:


Second test:

[Alberto]

Also, if you want to save a few bucks, you can get their bulk 6 pack w/ pre-paid postage here:
http://www.blackston...m/order-now.php

You can get the diff and transmission oil done as well. I had meant to do that but wound up sampling the oil in my street cars and tow vehicle.


Here is a cool tool to convert the PDF that Blackstone emails to you, strips out your personal information and converts into an image file (JPG).
http://gonkgonk.com/uoa_convert/

[Killian]

From last season...

http://forum.miata.n...ad.php?t=387783

[SaulSpeedwell]

I don't want to post the actual report because Facegoogle will find a way to sell it to Iran for profit, but I ran a sample one National weekend and another sample two National weekends and found the wear "per hour" to be the same. Thus, I started changing oil after every two weekends instead of after every one weekend.

Mobil1 10W30 with OEM filters, 1999 car.

I've run a lot of samples of Mobil1 10W30 versus Pennzoil PLatinum. The PP wears a little less but breaks down more dramatically. If you read every relevant post on BobIsTheOilGuy.Com you will likely conclude this is "the expected result".

[Ron Alan]

I don't want to post the actual report because Facegoogle will find a way to sell it to Iran for profit, but I ran a sample one National weekend and another sample two National weekends and found the wear "per hour" to be the same. Thus, I started changing oil after every two weekends instead of after every one weekend.

Mobil1 10W30 with OEM filters, 1999 car.

I've run a lot of samples of Mobil1 10W30 versus Pennzoil PLatinum. The PP wears a little less but breaks down more dramatically. If you read every relevant post on BobIsTheOilGuy.Com you will likely conclude this is "the expected result".

So give or take 10 heat cycles...maybe 3-4 hrs you are changing oil? Anybody find the oil still works fine after 10 hrs? My guess is all teams at the NASA 25 hr run the entire race on the same oil...what do you guys use for this extreme?

[SaulSpeedwell]

So give or take 10 heat cycles...maybe 3-4 hrs you are changing oil? Anybody find the oil still works fine after 10 hrs? My guess is all teams at the NASA 25 hr run the entire race on the same oil...what do you guys use for this extreme?

I've run a few 24 hours and the teams never changed oil - but they also never expected much from the motor afterwards. The oil nerds at BITOG (which seems to include retired petroleum engineers) have their own language for which oils are "best" ("blah blah Class III base stock blah blah"), and they at least appear to be able to explain the difference between Mobil 1 "Extended Performance" and the other twentytwelve versions of Mobil 1. However, all those guys seem to be wusses when it comes to extended drain intervals, so they love it when someone posts a Blackstone report with 10K miles or more. I stretched some cars to 15K with no issues except the oil was starting to get diluted by fuel at that point - likely not a problem for an enduro motor. None of the enduro cars were mine or I would have been tempted to send a sample in just for fun.

I didn't go more than 2 weekends per change because I like cutting oil filters apart and monitoring the "glitter factor". Once you get used to looking at the filters, these motors give a pretty decisive warning ("more glitter, bigger flakes") when the bearings are starting to go.

[SaulSpeedwell]

One of my reports: http://specmiataclas...ttach=781;image


Notice that 3 hours of track time produced similar numbers as "3800 street miles" of similar engines in Blackstone's database.

[robertcope]

Here is a cool tool to convert the PDF that Blackstone emails to you, strips out your personal information and converts into an image file (JPG).
http://gonkgonk.com/uoa_convert/

Didn't expect to ever see this here! I own gonkgonk.com and wrote this tool. It is offline right now because didn't think anyone used it, but it should be simple enough to make it go again.

This thread is interesting to me, in fact, I recently posted a question to BITOG around OCI for race cars:

http://www.bobistheo...175#Post2460175

robert

[Alberto]

Didn't expect to ever see this here! I own gonkgonk.com and wrote this tool. It is offline right now because didn't think anyone used it, but it should be simple enough to make it go again.

This thread is interesting to me, in fact, I recently posted a question to BITOG around OCI for race cars:

http://www.bobistheo...175#Post2460175

robert

Awesome tool Robert. I stumbled upon it by accident after wasting time cropping the PDF.