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Zinc added to oil

 
Old 04-11-2019, 09:20 PM
  #81  
Frankie the Fink
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Originally Posted by fjd View Post
OK we are off the rails here. Pray I dont create a new thread about the squeak coming from the left rear now. When I rock it. I know I know, pics. Could be bushings, springs, shock, gremlins.
Some think quoting costs for parts and work from 70 years ago carries some relevance today. It doesn’t.
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Old 04-11-2019, 09:29 PM
  #82  
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Originally Posted by Frankie the Fink View Post
Some think quoting costs for parts and work from 70 years ago carries some relevance today. It doesn’t.
Don't be so hard on Mike..........I think he was talking about 55 years ago. Yes, times have changed, but $165 for an oil and filter change is still to much for these old Chevies. But for a new Porsche Boxster it is about the norm.

Larry
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Old 04-11-2019, 09:46 PM
  #83  
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“Those who fail to learn from history are doomed to repeat it.”

Historical data is relevant when scaled proportionally.
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Old 04-11-2019, 10:04 PM
  #84  
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Originally Posted by ditchdigger650 View Post
I’ve been using Brad Penn 10-30 for years now, no issues. The green oil, for flat tappet cams.
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Old 04-12-2019, 08:08 AM
  #85  
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Originally Posted by fjd View Post
OK we are off the rails here. Pray I dont create a new thread about the squeak coming from the left rear now. When I rock it. I know I know, pics. Could be bushings, springs, shock, gremlins.
Spraying the bushings with rubber lube used to be part of the $1 lube job!

Swing by that specialty Corvette shop and get an estimate on how much they'll charge to diagnose your problem.
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Old 04-12-2019, 08:49 AM
  #86  
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85 posts on engine oil!

Who says the good times are gone forever?
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Old 04-12-2019, 09:00 AM
  #87  
fjd
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I can only imagine. Diagnosis fee, road test fee, high pitch frequency test fee.
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Old 04-12-2019, 09:02 AM
  #88  
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Originally Posted by fjd View Post
I can only imagine. Diagnosis fee, road test fee, high pitch frequency test fee.
OBD-II scan, adjusting the glublink, and replacing the ratafrat.
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Old 04-12-2019, 09:07 AM
  #89  
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Originally Posted by fjd View Post
I can only imagine. Diagnosis fee, road test fee, high pitch frequency test fee.
So after 87 helpful replies, have you decided what to do about your oil dilemma?

Expiring minds want to know.....
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Old 04-12-2019, 09:13 AM
  #90  
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Originally Posted by Frankie the Fink View Post
85 posts on engine oil!

Who says the good times are gone forever?
Who couldn't see this coming? See post #3.
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Old 04-12-2019, 09:36 AM
  #91  
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I've decided to use.............
Rotella T5 Synthetic Blend Diesel Motor Oil, 15W-40 w/CK-4,

That is until the franastan breaks.
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Old 04-12-2019, 12:37 PM
  #92  
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Make double sure you use the correct left handed metric crescent wrench on the drain. Failure to do so will void your warranty.
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Old 04-15-2019, 06:45 PM
  #93  
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Does anyone have experience with this oil?


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Old 04-15-2019, 06:48 PM
  #94  
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Yep. I've used it. Works just fine.
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Old 04-15-2019, 07:19 PM
  #95  
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Same here, I use it in both my diesel rigs and my old cars. Available at Costco at a great price!
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Old 04-15-2019, 11:27 PM
  #96  
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I like the Rotella because it leaves less stains on the floor of my garage compared to full synthetic. Old unrestored cars tend to leak just like their owners.
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Old 04-16-2019, 03:08 AM
  #97  
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Not to stir the pot (!).. but according to Chevron, the zinc content in the Chevron Delo CK-4/SN oil is .08%, which is 800 ppm.
https://cglapps.chevron.com/sdspds/P...&docFormat=PDF

While Shell Rotella T appears to have 1200 ppm (https://en.wikipedia.org/wiki/Shell_Rotella_T), which is 50% more than the Chevron.
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Old 04-16-2019, 08:08 AM
  #98  
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Yes, I've looked at various CK-4 spec sheets and some have reduced P and Zn, which means less ZDDP. Further research revealed that ZDDP has been supplemented by a new Boron-based anti-wear additive, but the spec sheets don't list Boron concentration.

All C-category oils have to pass the same tests, including the anti-wear test, so the reduced ZDDP doesn't bother me, but I wish the spec sheets included Boron concentration. The important thing to remember is that CK-4 is said by all blenders to be "fully backward compatible" with all prior C-categories, so CK-4 is as good as prior categories in terms of wear protection for sliding surface valve train components, despite some having less ZDDP.

Duke

Last edited by SWCDuke; 04-16-2019 at 08:15 AM.
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Old 04-16-2019, 11:21 AM
  #99  
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Potentially adding to the confusion, Shell is now marketing a Rotella-branded oil "for gasoline pickups". This new product appears to be an SN-rated oil, not a C category oil. So always check the label.
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Old 04-16-2019, 12:35 PM
  #100  
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Boron - who knew? I learn something new everyday here on the Forum!

IIRC the zinc and phosphorus content was reduced because those amounts that made it through the combustion process became a contaminant in the catalytic converters and reduced their efficiency. I wonder how Boron acts in that regard?

Last edited by tuxnharley; 04-16-2019 at 12:41 PM. Reason: Addl comment
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