Is this good?

[Mighty HD]

Mobil 1 5w30, Mobil 1 M1-206 filter
2004 GMC sierra, 2100 miles on the oil, engine has a pinch under 8000 miles total. Gets driven on the weekends mostly, a few 20-30 min drives during the week if I can to bring temps up.


ALUMINUM 2
CHROMIUM 1
IRON 11
COPPER 91
LEAD 4
TIN 0
MOLYBDENUM 58
NICKEL 0
MANGANESE 0
SILVER 0
TITANIUM 0
POTASSIUM 1
BORON 133
SILICON 14
SODIUM 6
CALCIUM 2086
MAGNESIUM 9
PHOSPHORUS 562
ZINC 712
BARIUM 0

ALEX: No problems showed up in the initial sample from your GMC engine. Except for copper, wear
read at or below averages for this type of engine, which is a very good indication of normal wearing
parts and careful operation. Don't let the high copper throw you--we usually see high copper in new,
large GM engines. It may not drop for several more oil changes. Universal averages show normal
wear after 4,400 miles on the oil. No antifreeze, fuel, or water was found. At 7,901 total miles, this
engine appears to be wearing nicely.


SUS
VISCOSITY
@ 210 º : 61.1

FLASHPOINT
IN ºF : 390

FUEL
%
Antifreeze : 0

Water 0.0

INSOLUBLES
% : .3


I assume these are good?

I'm curious to get a sample from my work truck. It sees 15+ hours of idle time, and another 2-3 hours of drive time in HOT HOT weather, driven hard and abused on dino Pennzoil 5w-20. I'll post those results when I get the oil changed on it, and a TBN..

 

[Al]

Looks fine..The copper will go down. I assume you will be running longer drain intervals with Mobil 1??

Here is what the Moderators suggest for posting used oil analysis

"When you guys post your used oil analysis in here, I think it's a good idea to title it with the following info in it:

Oil type with viscosity
Miles on the oil
Vehicle type with year and engine
Then in the analysis posting please list the
number of months the oil was in service and driving conditions (do you drive it hard or gentle?) and as much info as you can provide (air and oil filter, climate type, any recent mechanical work, etc.)


By putting the right info in the title, it allows for easier searching in the future, because if you just title it "My oil analysis" that makes it harder for us to find the UOA later on when we want to do a search based on oil type."

 

[TooSlick]

Perfectly normal for a new, pushrod V-8....

These GM engines generate a fair amount of Fe, but that's due to their pushrod valvetrain and fully lubricated timing chain and sprockets. So you can't compare iron levels to a OHC or DoHC design that uses an unlubricated timing belt and has fewer parts in the valvetrain.

Most gas engine marine inboards and stern drives sold in the US are GM engines and they hold up very well....

Just to clarify, are there 2100 miles or 4400 miles on this sample?

TS

 

[Al]

quote:

---

Originally posted by TooSlick:
Just to clarify, are there 2100 miles or 4400 miles on this sample?

TS

---

I believe the 4400 miles was Blackstones benchmark for their "universal" average. That's how I read it..but its early

 

[Mighty HD]

2100 miles on the oil.

Next oil sample I post I'll post it correctly, sorry about the mix up.


thank's for the reply's!