mobil 7500 5w30 --3404 miles f150 4.6

[aztec12]

my #'s---avg#
alum 2---3
chromium 1---1
iron 33---15

copper 1---6
lead 0---1
tin 1---o
moly 147---47

nickel 0---1
mang 0---1
silver 0---0
titanium 0---0
potassium 1---1
boron 34---48
silicon 12---16
sodium 279---5

calcium 2472---2165
magnesium 8---199

phos 665---771
zinc 913---930
barium 0---1


sus viscosity@210f 56-63 --- 58.3 mine
flash 365 ------ 440 mine
fuel antifreeze 0 ---- ?
water insolubles tbn --2.2

COMMENTS
Robert; Normally when we find sodium in an oil it is from anti-freeze.in this case it may be an additive in this oil,which is mobil clean 7500.If the sodium was from anti-freeze we would expect to find poor bearing wear, and the metals from your bearings are perfect.We did find high iron wear, for an oil run in this type engine 3404 miles. our average oil sample from the 4.6 has 4400 miles on it,and iron wear averages only 15-ppm. your higher iron may show engine maturity, or there may be some sort of problem at steel parts. the TBN was 2.2,getting low.


Well guys i need info on this report please,this is my first oua and i guess the major thing here is the high iron and high sodium.of course this was mobil 7500 semi-synthetic that is good for up to 7500 miles they say? My oil with only 3404 miles had a TBN of only 2.2 left,i dont think it could go all 7500 miles,the oil was used for 3.5 months with mostly short trips and a few 25-plus mile trips the oil was gf-4 5w30 the only additive i put in there was an octane booster in the gas tank to clean the system i dont know if that made any difference in the way of the reading in this report?the additive was added in the middle of the run filter used was a napa gold.Right know im using trop artic semi-synthetic but i will just use it for 2k and then go with pennzoil platinum 5w30 full synthetic to see if things get better. thanks comments please?????????

 

[SSDude]

Sodium is an additive in this oil. However, your iron does seem a bit high. I wonder if 20wt would give you better wear numbers.

 

[Hirev]

That oil (iron) looks disappointing for only 3400 miles in your motor. Guess I would also try something different. Sure would not want to run this oil much more.

How many miles on your motor? I wonder how much of an effect the short trips are having also.

Also strange in a good way is the zinc is above limits for a API SM oil.

 

[buster]

So even Mobil's low cost blend shows high Fe and it's a completely different formula? Makes no sense...

 

[fuel tanker man]

I think the TBN thing is probably over-rated. TBN's are determined/reported in at least a couple of different manners, so I don't think I'd put a whole lotta stock in TBN. My opinion.

Secondly, you don't mention how many miles are on the engine. Just curious about that.

Dan

 

[TooSlick]

Way too much silicon (dirt) to evaluate how the oil did in this one....Look for a leak downstream from the air filter.

TS

 

[Ray H]

Lead & copper are low, so where's the iron coming from? Short-tripping, and its often attendant incomplete warmup, are always an oil killer combination. Would blowby gasses reacting with accumulated condensation result in sufficient acid production to result in corrosion of ferrous parts? Would it also account for the uncharacteristically low TBN at this low mileage? If that were the case, and if the truck had been taken out for a good warm-up romp prior to the oil change, would that have been sufficient to skew the water reading of this UOA down to zero? A number of "SM" motor oils are showing higher than usual sodium readings, so I'm not ready to condemn truck or oil on that basis - may just be part of the additive pack. Rather than dwell on how "bad" EM 7500 "is", maybe we ought to be wondering how much worse this UOA might've been with an "SL" dino under the same use conditions . . .

 

[aztec12]

by the way the truck has 92,250 miles

 

[1911]

Hey Guys,

What are the bore and piston ring materials in this engine type? Is it a cast iron block?

1911

 

[JohnBrowning]

TooSlick wont a high iron number drive down the TBN?

 

[sbc350gearhead]

What year is this vehicle, and how many miles are on it?

 

[aztec12]

1998 f150 4.6 triton with 92k on it.you all think that maybe the pennzoil platinum oil might give me better results?and also is this a BAD report?

 

[jorton]

On this type of engine I think high iron can only come from valvetrain.

Earlier this month the lab was having problems testing these new formulas but they said they solved the problem with their machine.

You should change brands.

Joe