M1 10-30, '94 Celica, 1.8 7AFE

[robert]

Would appreciate comments on UOA: Engine miles, 53,512 (rebuilt), miles on oil: 3174 City driving, many short trips. Blackstone Univ avg for this type engine in ()

AL 3 (4)
CH 1 (1)
IR 6 (8)
COP 5 (14)
LEAD 10 (5)
Tin 0 (2)
Moly 73 (55)
POTAS 1 (1)
BORON 140 (38)
SILICON 12 (14)
SODIUM 8 (9)
CALCIUM 2899 (1490)
MAG 26 (482)
PHOS 779 (770)
ZINC 906 (913)
BAR, NICK, SILVER, TITANIUM 0

INSOL .6 WATER .05 FUEL 2.0 Flashpoint: SHORT VISC: 60.7 (59 - 68)

Blackstone states lead is high possibly due to a particle trace in bearing element??? since other figures are in range. I am concerned about insolubles being at limit .6, water .05, fuel 2.0, and what is meant by the FLASHPOINT being short. Also, the viscosity for 3100 miles of use for a 10-30 syn is at the limit. Engine appears to be wearing prematurely to me.

If you all could address my concerns and advise if this is the best oil for my application. I live in Texas and many independent mechanics recommend a 20-50 wt for Toyotas in our summer climate. Dealer advises 10-30 Thanks!

 

[Al]

Well the lead is not out of control it just on the high side. Might be normal for the engine depending on how you drive. The insolubles are high. Perhaps to many short trips or a tuneup required.

In Texas you could go with a bottle of 15W-50 M-1 with the 10w30. a 25% will et you in the higher 30 wt range Mobil 1 10w30 is on the low 30 wt. scale

A 50/50 solution will get you into the 40 wt. range.

 

[YZF150]

The Iridium, however, represents severe lab error, or production contamination. A metal in the Platinum class floating around in the oil cannot be good news.

 

[robert]

Anyone know what is meant by the Flashpoint being "short"? Is it below standard? What causes high insoluble rate besides need of a tuneup as mentioned by Al. Thanks to Al and YZF.

(Please note that previous UOA was Castrol 10-40 (dino)which had gone to 30wt within 2K miles. This is a DOHC engine, which I am told tends to shear oil.)

[ July 20, 2003, 08:27 PM: Message edited by: robert ]

 

[Ken4]

Well your % fuel is just slightly over the limit, so fuel dilution could be causing your oil to thin.

 

[Jay]

You should ask Blackstone what they mean by "short". The flashpoint is an important item in this report because Blackstone also indicates significant fuel contamination which may be responsible for the high insolubles. How many miles did you have when the engine was rebuilt?

 

[robert]

Jay - I bought an imported engine that had 26K. The engine had been reconditioned with new lifters, valves, and seals. I have driven 27K+. My last UOA was about 1 year (14K miles) ago. At the time I was using Castrol 10-40 dino which revealed good wear and no problems, except the 10-40 has sheared to a 30W in 2K miles.

I emailed Blackstone with questions last Friday. Any comments you have are appreciated.

 

[robert]

TR3 - Thanks. I am using a AC-Delco filter. Will give Pureone try on next change along with Techron. Mobil 1 may be best, but my goal is not extended drain intervals.

I run synthetic because Toyotas are "high-heat" engines and I was hopeful syn would maintain better viscosity and prevent sludge. I would like to go to 4K intervals, but at 3K, M1 10-30 is at limit in this vehicle. I may go back to dino.

 

[Jay]

I think any time you have a problem report and you're unsure about what's going on--send it to an expert. That's what I'd do with this report if it were mine.

 

[TR3-2001SE]

Good advise Jay and I agree. Pay Terry to get an expert opinion rather than just us hacks. http://www.bobistheoilguy.com/terry.html

 

[TR3-2001SE]

I think the IR is for Iron not Iridium at least that is what I hope. It looks like you have two issues. Your engine must be running rich from all the fuel in the oil so I would address this first. This is also what is effecting the flash point. Not sure if this is related the the insoluables being high. I would think a better oil filter might be in order. You could try a treatment of Techron to clean up the injectors and a better oil filter and test again. I understand the Techron can affect your analysis by elevating the lead but not sure. Try a Pureone or Mobil 1 filter as they seem to be the best.

 

[MolaKule]

Iridium is from spark plug center electrodes.

I think Ir here is really supposed to be Fe.

 

[jjbula]

quote:

---

Originally posted by robert:
Would appreciate comments on UOA: Blackstone states lead is high possibly due to a particle trace in bearing element??? since other figures are in range. I am concerned about insolubles being at limit .6, water .05, fuel 2.0, and what is meant by the FLASHPOINT being short. Also, the viscosity for 3100 miles of use for a 10-30 syn is at the limit. Engine appears to be wearing prematurely to me.

If you all could address my concerns and advise if this is the best oil for my application. I live in Texas and many independent mechanics recommend a 20-50 wt for Toyotas in our summer climate. Dealer advises 10-30 Thanks!

---

Robert,

Do an analysis on another oil. You can try Mobil 1 15w50, Schaeffer 15w40, Delo, Delvac or a Dino 10w40. My '01 camry V6 didn't seem to run as well on 10w40. I could feel the engine fight the thicker oil.

The higher lead number might be normal for your engine and the lower viscosity is normal for Mobil 1.

 

[Drew99GT]

I higly doubt high lead is normal for this engine. I've seen other 7afe reports with 0 ppm lead after 5,000 miles with Mobil 1 10w30. One thing you may want to try is a different oil filter for this reason: I ahave a 94 Corolla with the same engine as you, and the AC-Delco gave me the worst cold start rattle ever. When I went to change it, even after running the engine to temp, no oil came out of the filter, so the ADBV obviously wasn't sealing. The problem is the Delcos for these engines are Champion Labs filters, identical to Supertech. I switched back to the trusty Napa Gold, and the filter remains full of oil even after sitting for a week (I tested it!!). So, perhaps your getting a slight bit of wear when you first start your engine as the pressure galleries have to refill every time you start the engine. This is only a guess however; something to look at. Other than that, you may want to do a full igntion tune up (plugs/wires/cap/rotor), new fuel filter, and then clean your throttle body and intake manifold. I did all that on mine, and my fuel mileage is darn near unbelieavable now. Perhaps that's where your fuel dilution is coming from. Also check that your thermostat isn't stuck open. Had that problem as well on my Corolla which killed gas mileage.