Hi Folks:
I was referred here from dieselplace, and have been reading a ton while I awaited approval. Great site. Kudos to the admins and mods!
I have a 2003 Duramax that I bought new. From the day I bought it until about 43K miles, I used Delo 400 from Costco and dropped it every 3500 miles.
At about 43K miles, I installed an OilGuard secondary, and changed oils to Delvac 5W/40.
Since then, my copper numbers have been through the roof.
That bottom analysis is my last one with Delo. Copper = 5.
AT 10,000 miles, I had the first batch of Delvac tested: Copper = 206!!!!
Holy smokes, so I dropped the oil, changed all the filters, and sent in a sample at 2500 miles. Copper = 68!!!!! All the other wear metals looked OK, so I figured it was copper residue from the last batch of oil ... I dunno.
So it's been a year and decided it's time to drop the oil again. I get the oil from AVLube with the kit, and figure, WTHECK, let's see what this old oil looks like.
Less than 15,000 miles on the oil. Copper is 326!!!!!
Man, I'm sure not sleeping any better since I went to OilGuard/Delvac.
What in the heck could be causing this? I'm getting ready to pull the OilGuard, sell the Delvac, and go back to my Delo 400 every 3500.
I appreciate any input I can get from this super-knowledgeable crowd.
Thanks very much!!
Rick Bin
I was referred here from dieselplace, and have been reading a ton while I awaited approval. Great site. Kudos to the admins and mods!
I have a 2003 Duramax that I bought new. From the day I bought it until about 43K miles, I used Delo 400 from Costco and dropped it every 3500 miles.
At about 43K miles, I installed an OilGuard secondary, and changed oils to Delvac 5W/40.
Since then, my copper numbers have been through the roof.
That bottom analysis is my last one with Delo. Copper = 5.
AT 10,000 miles, I had the first batch of Delvac tested: Copper = 206!!!!
Holy smokes, so I dropped the oil, changed all the filters, and sent in a sample at 2500 miles. Copper = 68!!!!! All the other wear metals looked OK, so I figured it was copper residue from the last batch of oil ... I dunno.
So it's been a year and decided it's time to drop the oil again. I get the oil from AVLube with the kit, and figure, WTHECK, let's see what this old oil looks like.
Less than 15,000 miles on the oil. Copper is 326!!!!!
Man, I'm sure not sleeping any better since I went to OilGuard/Delvac.
What in the heck could be causing this? I'm getting ready to pull the OilGuard, sell the Delvac, and go back to my Delo 400 every 3500.
I appreciate any input I can get from this super-knowledgeable crowd.
Thanks very much!!
Rick Bin