15W-40 Delvac 6374 miles 97 Maxima

[zorobabel]

This is my first UOA ever, enjoy.
The oil is CJ-4/SM Mobil Delvac 1300 bought before March 2011.
The filter used was a WIX 51315.
The use was mostly commuting 27 miles one way (stop and go traffic and low speed driving in hot weather - what you'd expect for I5 commuting in Orange County) with a 7-800 mile Yosemite trip trown in.
350 ml of oil was added about 3000k miles in.
The intake duct was taken off twice to replace the starter.
The magnet on the drain plug was almost clean (I changed the oil 2 days later).
The previous 3 oil fills were 70% Peak 5-10W-30 and 30% Delvac.
I didn't use any fuel additives this OCI, but for past OCIs I used about 2 doses of Techron or Regane per OCI.

 

[FCD]

JN1CAxxxtrolololo?

 

[FCD]

No seriously looks like a good UOA, wear metals are low, Zinc seems lower than expected.

 

[zorobabel]

I did edit the personal information fields, I knew someone would appreciate it.
Originally Posted By: FordCapriDriver
JN1CAxxxtrolololo?

 

[4WD]

Looks good … especially when you consider the cost of that oil …

 

[wdn]

Silicon a bit high at 14 ppm? Time to change the air filter?

 

[zorobabel]

Originally Posted By: wdn
Silicon a bit high at 14 ppm? Time to change the air filter?

It does seem a bit high. At around 155k I did do some engine resealing; valve covers, oil pans, timing covers - all needed silicone gasket maker. I also mentioned I took the intake duct off twice during this OCI.
The air filter was changed after the sample was taken.

 

[Oildudeny]

How come you run a 15w40 oil?

 

[Zee09]

Originally Posted By: Oildudeny
How come you run a 15w40 oil?

I wondered about that as well.

 

[Gasbuggy]

Glad to see it considering I just got 10 gallons to my door today because of Mobils crazy $7 a gallon rebate. I will be putting it in some non-specd vehicles. Looks like 6-7k is no problem. The current formula jug states it's for extended drain intervals.

 

[zorobabel]

Originally Posted By: Oildudeny
How come you run a 15w40 oil?

I had it (as stated in the OP, it was bought before 3/2011), and I wasn't going to throw it away

.

I missed to point out that the oil was in use for 4 months.

 

[SR5]

Originally Posted By: Oildudeny
How come you run a 15w40 oil?

Because
- it's cheap
- it works well (3 ppm Iron in 6k miles)
- the OP lives in a warm climate (CA) so no cold start issues
- the OP had it, so why not use it

I use 10W40 and 15W40 all the time.

 

[wdn]

I just got 4 gallons of Delvac 1300 Super myself at that crazy $1.76 a gallon rebated price. I just this minute took it off my front steps and unpacked it. Now I have 10 gallons of Delvac unopened in my garage.

 

[Oildudeny]

Is fuel economy affected? 0,5 and 10 are known to be economy oils.

 

[zorobabel]

Originally Posted By: Oildudeny
Is fuel economy affected? 0,5 and 10 are known to be economy oils.


It's hard to do a proper test, maybe if I drove to Alaska and back twice in a month using different oils. But I do keep logs for mpg, maybe I'll post those this evening.

 

[zorobabel]

Here are my mpg records for the period...

 

[zorobabel]

I've seen 2 VOAs show Boron to be at about 65 ppm. This UOA shows 22 ppm; where did it go?