Pennzoil HM 5W30, 5.5k, 05 Chevy Cobalt 290k miles

[drtyler]

Here is the recent UOA for an '05 Cobalt with 290,500 miles. Oil used was Pennzoil HM 5W30, and top off oil (1 qt) was Pennzoil 5W30. Pennzoil has been used for the past few changes. The sodium level caught my eye as being high, but it is possible that some Valvoline was used to top it off at some point during the interval.

Lab used was ALS.

Code:


Oil Pennzoil HM 5W30

Miles in Use 5,542

Miles on Engine 290,500

Date 11/21/15





Iron 8

Copper 4

Tin 2

Aluminum 4

Silicon 8

Sodium 160

Potassium 7

Magnesium 7

Calcium 2400

Phosphorus 751

Zinc 893

Molybdenum 227

Boron 51



Water
Coolant No



cSt 100C 10.5



TBN 4.1

 

[pbm]

290K on an Ecotec is impressive....have you had any issues?

 

[drtyler]

Only major issues have been the automatic transmission. First transmission went out at 30k. It was replaced with a used transmission, and that one lasted until 285k. Another used transmission went in, and I suspect we'll use this car until something else major pops up. It's been a really good car so far (knock on wood)!

Originally Posted By: pbm
290K on an Ecotec is impressive....have you had any issues?

 

[Bud_One]

Very nice.
What was your driving percentage? - Hwy vs City

 

[drtyler]

Mostly highway (say 2/3 of the miles), but daily drive to office is only 8 miles.

 

[aquariuscsm]

Good looking uoa! Pennzoil uoa's ways look great!

 

[bigt61]

Those Ecotec 4 bangers are tanks - very durable engines. Nice report.

 

[KCJeep]

Looks excellent, 5.5k on conventional with a 4.1 TBN remaining is exceptional. Pennzoil is just awesome. You could run it much further no doubt.

Only thing out of place is the sodium and you already addressed that.

 

[Gasbuggy]

They don't look for lead?