02 Jeep 2.5 9k 13months RTS/PureOne PC

[Gary Allan]

My 2.5 sorta slipped through the cracks. I knew that I needed to service it ..but other vehicle needs took precedence. This is the first UOA that this engine has seen. Obviously, it has seen mostly shorter trips. Occasionally the wife will do her 25 mile one way commute in it if her jeep is low on gas.

Test was performed by Blackstone Labs w/ Dyson analysis and particle count.

2002 Jeep Wrangler SE 2.5 Auto
Miles on oil: 8994
Miles on vehicle 50,125
Time on oil: 13 months
Filter: PureOne (Ph16 size)
Airfilter: OEM about 1 year old

Al 6
Chr 3
Fe 74
Cu 8
Tn 0
Pb 0
Moly 122
Nickel 2
Maganese 1
Silver 0
Titanium 0
Potassium 2
Boron 4
Silicon 19
Sodium 9
Calcium 2666
Magnesium 125
Phosphorus 935
Zinc 1234
Barium 0

Visc 78.3
Flashpoint 345
Fuel 1.5%
AF 0
H2O 0
Insolubles .4

TBN 2.5

ISO Particle Count: 17/16/13,
Particles were:
>2 micron = 1,666,
>5 mu = 617 mu,
>10mu = 170,
>15 mu = 66,
>25 mu = 15,
>50 mu = 1,
>100 mu = 0.

My take. It appears that this 40 weight doesn't inhibit the characteristic Fe dandruff that these engines are known for. Otherwise, considering the service, my novice eye doesn't see anything too odd. PC looks decent (but what do I know

)

The crankcase was refilled with RTS and a PremiumPlus filter that I bought by mistake

The engine showed less consumption on this oil then either D1 (official D1-not T&SUV -for those who doubt) or Agip PC 5w-40. They showed about 1/2 quart at about 7k ..which was typically when I would change the oil. RTS held out till about 12m/8.5k to show less then full on the stick. I think the TBN did okay for a short trip engine over this duration.

Comments? Anyone? Anyone? Bueller? Bueller?

 

[Amkeer]

High iron?? Silicon is high also. The fuel is at 1.5??? Looks like you have some adjustments to make on this. Should be fun!

 

[Pablo]

RTS?

 

[Gary Allan]

I don't know if the silicon is some component of the oil. Since there's no Alum, or Chrome, I would think that we can rule out air filtration. Could be though

No Pb ..so I doubt that the PCV system is sucking anything in.

The 1.5 fuel is most likely due to the almost exclusive short trip usage ..or so I would reason. Plugs are relatively new. There could be some issue there.

The Fe is a signature characteristic of the jeep/AMC/DC engines. Heavier oils usually reduce it. This level of Fe over this OCI would be common.

Previously, 7k would take about 6 months for this vehicle. That was when my job was about 22 miles away. Now it's 9 miles ..and I've been driving my van almost exclusively to put mileage on the filter (filter test).

 

[dkcase]

quote:

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RTS?

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Rotella T Synthetic.

I use it on 2 of the 6 vehicles I service.

 

[Gary Allan]

One odd thing ..and I don't know why ..but there were no universal averages included with this test. I cannot believe that this is the only 2.5 jeep that they have on file.

I'm eager to hear what Terry says about it.

 

[Ugly3]

I am particularly impressed with the particle counts. Look much better than Filter Guys with fewer miles and an E-Core filter.