Fresh oil turns black immediately - CamaroZ28.Com Message Board

Go Back   CamaroZ28.Com Message Board > 1967-2002 F-Body Technical Discussion > General 1967-2002 F-Body Tech

Reply Post New Thread
 
 
LinkBack Thread Tools Search this Thread
Old 02-27-2014, 11:45 AM   #1
Registered User
 
cohopefull's Avatar
 
Join Date: Aug 2008
Location: Westchester, New York
Posts: 33
Fresh oil turns black immediately

I've been changing oil for a long time and usually the fresh oil stays clear for some time but the new oil in my 95 Z28 turns black right away. The previous original owner swears it was maintained regularly. The car only has 44k on it. I m guessing he's either lying or the car has much more miles on it than 44k. Any thoughts?
__________________
'99 Z28, 6 speed, SS Hood, Lid
'03 Corvette 6 sp
'65 GTO 4 speed, Tri-pwr
cohopefull is offline   Reply With Quote
Old 03-15-2014, 12:22 AM   #2
Registered User
 
1994BmtZ28's Avatar
 
Join Date: Feb 2010
Location: E. Texas Gulf Coast...a.k.a. the 3rd Coast
Posts: 173
Re: Fresh oil turns black immediately

I'd say he may have changed it just to sell the car. Get the liquid Seafoam & pour half of it in the crankcase, drive it 200 miles MAX, then do an oil change (I drive 100 miles to keep from overdoing it). I inherited my father's Silverado & a couple regular oil change intervals cleaned it out pretty well...or as well as could be expected for 145K miles. The other half of the can's contents can be poured into a full tank of fuel & clean the injectors also FYI.
__________________
1994 Z28 Red, hardtop, 4L60E, LT1 with Stage 1 ported stock heads, cc305 114 LSA, 1.6 rr, beehives, Pacesetter LTs, LS1 front brakes, Ultra Z hood/air box/spoiler, Kenny Brown Double Diamond SFCs. 102.41 mph/13.74 ET in 1/4 mile, dyno @ 305 rwhp/321 lb/ft rwtq.
1994 Z28 Arctic White, T-tops, dormant donor.
1994BmtZ28 is offline   Reply With Quote
Old 03-17-2014, 11:02 PM   #3
Registered User
 
Mr99SS's Avatar
 
Join Date: Aug 2013
Location: south carolina
Posts: 264
Re: Fresh oil turns black immediately

newer oil has a conditioner called ... cant think of the name but it takes all of the bad stuff out of the engine = black oil
__________________
99 SS vert M6 slp#0405 21k miles 13.21 no tune
99 z28 cam only hard top mystic teal metallic a4
06 TBSS 2wd 13.55 89 TTA#299 89 TTA#1397 built
87 GN Small turbo small motor big torque
Mr99SS is offline   Reply With Quote
Old 03-18-2014, 05:26 AM   #4
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 43,081
Re: Fresh oil turns black immediately

That would be "detergents" and "dispersants". Detergents clean, dispersants keep soot in suspension so it can be filtered and not settle out. Some black is normal. Immediate excessive black would seem to indicate a higher than normal level of ring blowby, unless its an engine that has never been properly cared for.
__________________
Fred

94 Formula A3+1: 381ci all-forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams custom solid roller / TH400 + GearVendors OD / Strange 12-bolt - 4.11's / 300-shot N2O / Spohn suspension / 6-pt roll bar with integrated SFC's / AutoMeter instrumentation / MoTeC M48Pro engine management system / a few other odds 'n ends. 800HP/800LB-FT at the flywheel.
Injuneer is offline   Reply With Quote
Old 03-18-2014, 12:32 PM   #5
Registered User
 
cohopefull's Avatar
 
Join Date: Aug 2008
Location: Westchester, New York
Posts: 33
Re: Fresh oil turns black immediately

Quote:
Originally Posted by Injuneer View Post
That would be "detergents" and "dispersants". Detergents clean, dispersants keep soot in suspension so it can be filtered and not settle out. Some black is normal. Immediate excessive black would seem to indicate a higher than normal level of ring blowby, unless its an engine that has never been properly cared for.
I was thinking the same thing, the engine is probably loaded with sludge. I also suspect it has 144k instead of 44k.
__________________
'99 Z28, 6 speed, SS Hood, Lid
'03 Corvette 6 sp
'65 GTO 4 speed, Tri-pwr
cohopefull is offline   Reply With Quote
 
Reply Post New Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
HP Tuners for Boost.... DirtyDaveW Forced Induction 12 01-17-2015 09:03 AM
Starting challenges green.Z LT1 Based Engine Tech 4 11-21-2014 06:19 PM
Why Reuss Published that letter.... formula79 Automotive News / Industry / Future Vehicle Discussion 26 08-05-2002 12:21 PM


All times are GMT -5. The time now is 05:34 AM.

 

Copyright © 1996-2013 CamaroZ28.Com. All rights reserved.