Engine/Transmission (1998.5 - 2002) 'Nother oil analysis...

[Gary - K7GLD]

4000 miles on Delo 15/40 - about 2/3 towing - no added oil...



All below PPM:



Aluminum - 2

Chromium - 2

Iron - 19

Copper - 9

Lead - 4

Tin - 1

Silicon - 11



Fuel - 1

Insolubles - . 3



Seems to all fall well into "normal" or better range for an engine with only 2000 miles on it at the beginning of the test period and equipped as listed below, towing a 7000 lb 5er...



Now for my bypass filter install and switch to synthetics in the transmission and differential...

 

[Riflesmith]

Gary,

Can I asume you mean 20,000 miles instead of 2,000?



Your numbers look good. Your silicon is just a tad high. You may want to inspect your air filtration system for air bypassing the filter. With only 20,000 miles on the clock, the silicon could still be leaching from your new seals.



Do you have some viscosity numbers listed on your analysis?

 

[redram]

Silicon is not high Riflesmith - but the copper and lead are for a 4000 mile oil interval, except for breakin wear, those values should be lower than that.

 

[Gary - K7GLD]

YES, I meant *2000* miles - new truck!



Admittedly too early to get excited over sampling numbers, but I wanted SOME baseline before the bypass install...



Viscosity value was 74. 9, right in the middle of recommended values...



As far as silicone - and Copper for that matter, it seems these engines are traditionally high in BOTH numbers when new, supposedly from sealants on the silicon, and some of the lines in the lube system - my numbers look quite good, including the lead, as compared with others from low mileage engines like mine - most of which were quite a bit higher mileage...

 

[Cliffman]

How about this one

How does this oil analyst look guys? My oil analyst

 

[DocStressor]

Cliffman -- Were you drag racing or pulling a sled during some of those intervals? Your soot is high, probalbly from your big injectors. The high wear metals suggest very hard driving. You might consider going to 15W-40 unless you really need the slight hp edge you get from 5W-30.

 

[Gary - K7GLD]

I agree with Lee - but that report was a bit confusing, so I didn't wanna show my stupidity (again) by commenting... It was (is) unclear to me how many miles was on that oil?



I use Blackstone, and their reports are a bit easier for me to follow...

 

[DEZLPWR]

I'm confused also....

I don't like the format of that report. I'll stick with my Blackstone analysis...

 

[amsoilman]

By looking at the reprot of "Cliffmans", it appears that he changed the oil at 69,595 miles, and most recent analysis was taken at 81,509 miles for a TOTAL of 11,914. 0 miles on the oil. The analysis also shows that he added 1 quart of oil in that time frame. By my calculations, the change occured on 03/27/02.



How about it Cliffman, is this info correct?



Wayne

amsoilman

 

[Cliffman]

Yep

That would be correct What the report dosen't show is that I changed the filter every 3-4K and added a quart but didn't pull a sample.

 

[LSMITH]

Gary, what were the viscosity, TBN and oxidation values for the sample? The iron number you got is great, I have never in 110K miles seen an iron number that low with Delo. I have been that low with Rotella though.

 

[Cliffman]

Lee Weber, Which one of the samples were you referring to? As you can see I was having some very high levels on Iron and Copper on the first 3 samples. We attributed this to the copper oil cooler because after I changed the oil and sampled it with 12k miles on it the copper and Iron levels dropped. I don't hotrod very often but I do pull a 15k 5er/sled. My Sled

Do you think that all the soot levels are high

 

[Gary - K7GLD]

LSmith - no oxidation or TBN - I personally don't consider them of much value in relatively short service intervals - and as indicated above, viscosity was at 74. 9 against a recommended value of 69-90 - right in the middle of the ballpark - so no reason to expect the other values to be excessive either...



All my anti-wear oil components were right on target as well...



And no makeup or oil was added - oil still slightly above the full mark on the stick, just as it was when I had put the fresh oil in...



Actually, I thought the iron was a bit high - but figured that was due to low miles on the new engine... I'm used to seeing 8 ppm on my old '91 with more like 5-6000 miles on the oil - but it was fully broken in and had a frantz bypass filter, as THIS one will in a short while...

 

[DocStressor]

Ok Cliffman, that make more sense now. I suspected that you might have had a mechanical problem, but since you didn't mention one in your original post, I was confused. Unmodified engines generally show 20-30 ppm iron and <0. 5% soot after 7,500 miles. So your iron looks ok now when you consider that some of the stuff must be carry over from your previous change. But your soot is still high. You never want to exceed 3% soot if you can help it. Your modifications result in overfueling and increased soot as they allow more hp and torque. There is no such thing as a free lunch. High soot increases oil viscosity in a manner that can mask the effects of shearing of the base oil and VI improvers. Elevated soot can adversely affect the hydrodynamic lubrication properties of the oil and accelerate cylinder bore polishing. I don't think you should go beyond 15K at most between changes with your mods.

 

[Cliffman]

12K

Sounds good Lee, I normaly change oil at 12K and filter change every 3-4K.

 

[Sled Puller]

Congratulations Cliffman!



You have succeded in showing me the worst 5W-30 sample I have ever seen!



I would be cautious about extending drains in a BOMBed truck, I use to run 35,000 miles on 5W-30, no By-Pass, but had to stop because of soot.

 

[Cliffman]

So now what do you do Sled Puller? Just curious

 

[Sled Puller]

I keep it changed more often, depending on how many pulls I had, I don't have a set pattern yet because I kept chnging fueling and turbos this summer.

One sample will be fine, the next over sooted.



The sample would come back with:



" ELEVATED SOOT. CHECK INJECTION SYSTEM. "





hehehehe

 

[Gary - K7GLD]

"You have succeded in showing me the worst 5W-30 sample I have ever seen!?



HEY! Watch it!



You trying to oust me as sitting President of the "Lack-of-tact" club?



Give it up, I *won't* step down quietly - I have WAY too big a "fan club"...