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| This is a discussion on UOA Used Oil Analysis within the The File Library forums, part of the Gen II (2004-2009) Toyota Prius Forums category; My latest. As Blackstone noted, I went past the first recommendation of 8,000 miles. The numbers on my 7,400 test ... |
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UOA Used Oil Analysis
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02-27-2009, 01:01 PM
| #51 |
| Senior Member  Join Date: Jan 2004 Location: South Burlington, VT
Posts: 2,549
My Car: 2004 Prius Model: Package: #8 Thanks: 6
Thanked 17 Times in 16 Posts
Friends: 1 |  Re: UOA Used Oil Analysis My latest. As Blackstone noted, I went past the first recommendation of 8,000 miles. The numbers on my 7,400 test compared well to others posted here who had gone on to 10K so I figured I was fine to go to 10K as well. I changed it at 10,000 but never got around to mailing the sample in. I HAD planned to change it at another 10,000 but as I drive 2000+ miles per month, it got away from me in just a couple of weeks time. Glad to see everything was still OK at 11,600. They recommend going to 13,000 on this fill. That will almost take me to the 100,000 mile mark! And the gas in the oil; yeah if it is related to idling in cold weather, I certainly have that. Idling, I HATE idling!!! And yes, I do shut off the heat at red lights (once the cabin has warmed up enough I won't fog the windows) so the ICE will shut down. Did I mention I HATE idling? 
__________________ Bruce Mine: Driftwood '04 BC 24 Sept 2004 - added: mudflaps, door edge guards, side panel moldings, Coastal Tech EV switch, OEM Integrity tires, WeatherTech window deflectors. Last tank - 14 Jul '09: 728.9 miles - MFD MPG: 56.0 Actuals Lifetime: 93,087.3 miles, 48.90 MPG. Wife's: Barcelona '06 #7 May 2006 - added: front mudflaps, Coastal Tech EV switch. OEM Integrity tires. Last tank - 21 May '09: 419.4 miles - MFD MPG: 46.7 Actuals Lifetime: 31571.4 miles, 44.82 MPG. |
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02-28-2009, 01:54 PM
| #52 |
| Senior Member Join Date: Oct 2004 Location: Winnipeg Manitoba
Posts: 11,564
My Car: 2004 Prius Model: Package: B Thanks: 35
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Friends: 12 | Re: UOA Used Oil Analysis Bruce Those are very good numbers. I think a lot of folks fail to realize in temps of -20 C and colder, certainly -40 C, it's rare for the Prius motor to automatically shut down at red lights. Even with a winter front jay jay |
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03-15-2009, 09:51 AM
| #53 |
| Member  Join Date: Feb 2008 Location: Pensacola, FL
Posts: 81
My Car: 2008 Prius Model: Package: #2 Thanks: 0
Thanked 0 Times in 0 Posts
Friends: 0 | Re: UOA Used Oil Analysis Just received my first oil analysis after 17800 miles. This was the first oil in the car after factory oil. Stop and go delivery usage @ 40% . Will change at @15K next time and retest. Let me know what you think. |
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03-15-2009, 11:04 AM
| #54 | |
| Senior Member  Join Date: Jun 2007 Location: Tampa Bay
Posts: 1,845
My Car: 2001 Prius Model: Package: N/A Thanks: 4
Thanked 17 Times in 16 Posts
Friends: 2 | Re: UOA Used Oil Analysis Quote:
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03-15-2009, 11:22 AM
| #55 |
| Member Join Date: Feb 2008 Location: Pensacola, FL
Posts: 81
My Car: 2008 Prius Model: Package: #2 Thanks: 0
Thanked 0 Times in 0 Posts
Friends: 0 | Re: UOA Used Oil Analysis i noticed the difference also..idk??? |
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03-15-2009, 11:53 PM
| #56 |
| Senior Member Join Date: Oct 2004 Location: Winnipeg Manitoba
Posts: 11,564
My Car: 2004 Prius Model: Package: B Thanks: 35
Thanked 185 Times in 168 Posts
Friends: 12 | Re: UOA Used Oil Analysis Hmmm TAN: Total Acid Number TBN: Total Base Number You can think of the relationship of TAN:TBN as reciprocal. As TBN decreases, TAN increases I'm a bit puzzled by that aspect of the oil sample report. If they really meant TAN, the oil is in good shape. Mostly, TBN is reported now |
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| analysis, oil, uoa |
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