Chev 4.8l V-8 Chevron 5w-30 4000 miles

[Bill in Utah]

My last UOA with this engine came back with possible Coolant leak.

There was a chance that the Mobil 7500 I ran a few oil changes was looking like coolant. So I changed the oil again after a few hundred miles and put on a new filter and 6 quarts of Chevron 5w-30. No LC, no FP on this run. Just oil and filter.

Ran 4000 miles with this. About 70% highway and 30% real short trips (less than 2 miles one way).

Blackstone is the lab for this one. My last UOA with this truck is here: Last UOA Pennzoil with possible coolant leak

Here is the report.



Whew, Mike was correct

and no problems here.

Any comments? Thanks in advance!

Take care, bill

 

[The Critic]

Bill,

Glad to see that there's no coolant leak.

The Iron value is questionable and you should have Blackstone re-run the sample. 1 ppm of Fe in a V8 after 4000 miles is unrealistic. 6-10 ppm would be more in-line.

Good to see that SM/GF-4 Chevron 5w30 retains its flashpoint well, and together with the Ecore filter, is keeping insolubles low. Bearing wear is excellent despire the shearing (8.5-9.0 cst), but since wear is good, I wouldn't be concerned.

Otherwise, it's a great report and you can now rest easy at night.

 

[Al]

Nice report. You must be feeling good about the lack of coolant.

 

[Ray H]

Hmmm... wasn't one of the arguments supporting the notion that Havoline was superior to Chevron Supreme that Havoline contained more moly? I guess the only logical explanation for this report is that some empty Chevron Supreme bottles inadvertently wound their way through the Havoline fill area.

 

[Drew99GT]

Bill, get some full synthetic in that thing if you want to get any kind of real longevity out of that outfit.

 

[ToyotaNSaturn]

Simply a great report! You've gotta feel great after seeing these stellar numbers !!! Although I am surprised to see you using a Chevron product in your crankcase.

PS: Way to go Michael on nailing the analysis dead-on!!

[ May 27, 2006, 11:08 AM: Message edited by: ToyotaNSaturn ]

 

[Bill in Utah]

quote:

---

Originally posted by Al:
Nice report. You must be feeling good about the lack of coolant.

---

You don't know! (after my "fun time" with my Ford and 2 sets of Headgaskets in less than 60k miles)

quote:

---

Bill, get some full synthetic in that thing if you want to get any kind of real longevity out of that outfit.

---

I know, it's terrible how a under $6 oil change incl oil filter performs.

I've had one valve cover off and it's perfect under there. Nothing, no tint or anything.

quote:

---

Simply a great report! You've gotta feel great after seeing these stellar numbers !!! Although I am surprised to see you using a Chevron product in your crankcase.

---

I'd have to say that the Chevron did do better than any other oil I've used. (Mobil 1, Pennzoil and Quaker State UOAs I've done with this engine)

Luckly, I've got a few more quarts of Chevron in the stash...

Take care all and thanks for the replies!