Ford Ranger 4.0 sohc, Mobil 1 5W30 @ 12,000 mi oci

[rubydist]

Ranger 4.0 sohc w/ 102,000 miles. Mobil 1 (standard) 5W30 w/ 12,000 miles oci, no oil added during the oci.

miles 102k 90k
AL 11 15
CR 2 4
FE 29 44
CU 13 12
PB 1 0
SN 0 2
MO 91 88
NI 1 1
MN 1 1
AG 0 0
TI 0 0
K 1 1
B 50 53
SI 13 14
NA 21 22
CA 2426 2424
MG 17 16
P 683 650
ZN 854 798
BA 0 0

SUS 62.7 59.2
cSt 10.97 9.98
Flash 390 400
Fuel Anti 0.0 0.0
H2O 0.0 0.0
Insol 0.4 0.3
TBN 2.4 3.4

History - just before the 90k oil change, I added a supercharger. At that time I found evidence of a slight intake leak on the old manifold. This would have allowed some unfiltered air to enter, so some wear metals 'could' have been attributed to this dirt injestion. The truck had also been on the dyno for at least a dozen full throttle - to redline runs during that oil's life. The 102k oil had no dyno runs and no known dirt injestion issues, and even though it has the supercharger now, I don't beat on it as its the daily driver and I need it to work. I put M1 5W30 in it again.

While these wear numbers are well within the "acceptable" range according to the BITOG page, they are above the "universal averages" and Blackstone thinks they are too high. Since I'm no oil expert, I'd appreciate some feedback on whether this is really okay, or if I should shorten the oci. FYI, I've been using M1 for 20+ years, so there is some emotional attachment there that makes me reluctant to switch to another oil, but I want this thing to last another 150k miles.

 

[buster]

Is the current UOA on the left? If so, other than the Al, I think the report is good.

 

[rubydist]

Yes, the latest is on the left - the system replaced all the 'tab' with 'space' so its now hard to read...

 

[buster]

Al is a bit high, but considering what you said about the air intake leak, I think it's excellent. Viscosity is perfect. I think M1 is working well for you.

 

[Blackplastic]

If your not satasfied with your results and like the M1 then just drain it earlier, and things will look better.

 

[JAG]

Kudos for doing long drains. Overall oil condition and engine tune look good. Make sure the intake system is sealed and clean inside since the aluminum is slightly high (maybe piston scuffing). I like some of the other M1 oils better than M1 5W-30 but it held up well in this long OCI.

 

[Tempest]

I'm jealous of your super.

My 4.0 OHV needs one!

Like the others I think it looks pretty good for the mileage. I would love to see what 5W30 and especially 10W30 Pennzoil Platinum would do with this motor as I bet the wear numbers would come down. The AW package they are using is very effective with good TBN retention for long drains.

HERE is one example of what it can do in a heavily moded engine. And Another for long drains.

If this were my truck in your climate with these long drains, I would be using (at least trying) Amsoil 5W30 HDD.

 

[ToyotaNSaturn]

Quite a good UOA for 12,000 miles on a V6 engine. I don't agree with the wear metal assessment being too high as it obviously has come down since the last UOA.

How much HP & torque is this engine now capable of with the supercharger? Is the transmission rated for the extra stress?

 

[rubydist]

Quote:

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Quite a good UOA for 12,000 miles on a V6 engine. I don't agree with the wear metal assessment being too high as it obviously has come down since the last UOA.

How much HP & torque is this engine now capable of with the supercharger? Is the transmission rated for the extra stress?

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Its not that I'm unhappy with the wear metals counts, I'm just trying to understand the definition of "good".

The s/c made a significant difference in the performance. Almost stock, the truck dyno'd 210 lb-ft, and 183 hp at the wheels, in current tune w/ blower and no charge cooling, it puts down 251 lb-ft and 217 hp. Someday I'll add charge cooling...

 

[Tempest]

I know a little bit about ruby's truck from his postings on a Ranger forum that we are both on, but not much about his tuning. I wonder if the good results he is seeing here are in part due to good fuel mapping and custom tune? I know he has spent some time to get the best from his truck, and a clean burn with optimum fuel ratio should be much easier on the oil. Opinions?

 

[rubydist]

I asked Blackstone why they were complaining about the wear numbers. Here is the response:

Quote:

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I think what the analyst was getting at is that the extra metal in the oil makes the oil abrasive, and that can shorten the engine's life, in theory at least. (There's really no way to tell how long an engine will last, or how long it might have lasted if you'd run shorter oil changes.) The oil is more abrasive than it needs to be, and for this reason we suggested a shorter oil change. But it's really up to you, how long you want to run the oil. Some people don't want to see metals reading above average, even if they're running longer than average oil changes. And some people are fine with extra metal. We make our recommendations on the conservative side, since we don't know how the person on the other end of the report feels about extra metal in the oil.

As far as where the metals should be, you can figure them on a per mile basis. Take aluminum. Average aluminum is 4 ppm after 4923 miles. Divide 4 by 4923, then multiply by 12,000 to see where your aluminum "should be."
Your metals are not too high for an oil run 12K miles, so we don't think any problems are going on. They are just making the oil somewhat abrasive.

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Since none of the reported wear metals are too high for 12k miles, I think I'll keep doing what I'm doing...

 

[SubLGT]

You may want to try an Amsoil EaO oil filter for these long intervals.