03-17-2013 | #1 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
|
Interesting oil test write-up
This oil analysis is posted on the CF C3 forum. And, since we have flat tappet motors too, I thought y'all might want to have a look-see.
http://forums.corvetteforum.com/c3-t...test-data.html P.
__________________
Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
03-17-2013 | #2 |
Join Date: Dec 2012
Location: NC
Posts: 1,786
|
Re: Interesting oil test write-up
Is there any new thing in oil?
I think intro of polymers of poly-flouroethanes into oil might have been a 'new' thing (Slick 50), but are any longevity studies available for it? Can't find corporate/subsidiary info on Stavely Labs who did the study???
__________________
I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
03-17-2013 | #3 | |
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
|
Re: Interesting oil test write-up
Quote:
Good stuff. Thanks for posting !
__________________
Scott Vett owner since 1979._It's about the car and the people |
|
03-17-2013 | #4 |
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,797
|
Re: Interesting oil test write-up
I know I am probably smoking dope (as many think) but I have to say this in regard to all the recent technical dialogues on Oils (engine and transmission) and Coolants. Lots of great reading for sure and that dialogue is appreciated.
SO.......here goes. I have a 1985 Toyota 4x4 with 275,000 miles that runs like new with no real engine issues (I did replace timing chain and heads at one time) for which I have always used Penzoil 10W 30. The BIG secret on engine and transmission life is frequent oil and filter changes (on that Toyota I changed oil and filter every 2,000 miles). Same on Transmission oil (much longer oil change intervals) which for the ZF S6-40 the ZFdoc recommends oil changes every 10,000 miles. Using synthetic oils I go about twice as long on oil changes. So as you can see.....I enjoy the discussions but stick to basics and just keep on running with these fluids LT5/ZR-1 Fluids Ya...I maybe pay a bit more but then getting 275,000 miles on a single engine is saving a whole lot more.
__________________
Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 03-17-2013 at 10:22 PM. |
03-17-2013 | #5 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
|
Re: Interesting oil test write-up
I have a Vibe GT w. 2ZZ motor and 175k miles. Never a warranty claim. Oil change and filter every 3k.
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
03-18-2013 | #6 |
Join Date: Jun 2005
Location: CenCoast California
Posts: 899
|
Re: Interesting oil test write-up
Our LT5s do indeed have flat tappet camshafts, but the none of the alarmist beliefs about flat tappet cam and lifter wear apply to our engines, because they use flat tappets and direct-acting bucket tappets rather than pushrods and rocker arms.
Yes, an LT5 has flat tappet cams, but its cam lobes are much wider than those you'd find on a camshaft in a pushrod V8, thus the load bearing area on the lifter face which is swept by lobe as the cam rotates is greater. In addition, our engines do not have the higher loads at the lobe/lifter interface which are typical of pushrod and rocker arm valve trains. Bottom line: the loads are far less and because of the width of the LT5 lobes, that less load is spread over a greater area. Engine oils which meet or exceed the old GM 4718M (previously applied to 93-95 LT5s) or the current "Dexos 1" specification will provide more than adequate lubrication of the LT5 valve train. No special engine oils or fortifying additives are necessary. That said, no harm will come to the engine if one chooses to use an engine oil with higher zinc/phosphorous content as long as the phosphorous content does not exceed 1600 ppm. Long term use of an engine oil with more "ZDP" than 1500-1600-ppm is likely damage your engine. Those who use one of the many "ZDDP", "ZDP" or zinc additives need to be cautious with such productds. Few of them specify their ZDP content, thus, it's impossible to know how much more zinc your putting in your oil. Some of those additives can be 10% or more (that's 100,000+ ppm) ZDP. With ZDP, the belief "if some is good more is better" absolutely does not apply. Over 1600-ppm phosphorous for extended periods will cause engine damage as well as greatly decreasing catalytic converter life so...buyer beware.
__________________
Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 Last edited by Hib Halverson; 03-20-2013 at 10:04 AM. Reason: added content |
03-18-2013 | #7 |
Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,486
|
Re: Interesting oil test write-up
|
03-18-2013 | #8 | |
Join Date: Jan 2004
Location: Alex VA
Posts: 1,087
|
Re: Interesting oil test write-up
Quote:
the LT5 valve train is pretty bullet proof and wears really well with decent and clean oil. the really high amounts of zinc will do more to "kill the cats" than it will help the engine. other than a few bad batches of "soft" cams (aftermarket) stock LT5s typically don't have much in the way of valvetrain problems. we just pulled apart an LT5 with only around 30k miles on it and the lifters and cams almost looked new. very little wear at all.
__________________
95 390 LPE ZR1 (505 rwhp) LSV = Lingenfelter Super Vette Twin Turbo 2003 Z06 (800 RWHP) |
|
03-19-2013 | #9 |
Join Date: Sep 2012
Location: Rockwall, Tx
Posts: 1,510
|
Re: Interesting oil test write-up
Since mileage has been brought up what is the highest mileage ZR-1 on the original motor that anyone here is aware of and what kind of problems, if any, came up due to those miles?
__________________
_________________ 1994 AB/Grey #141 430 RWHP/392 RWTQ FBI Lyposuction / Secondaries relieved of duty / SW Long Tube Headers / Corsa Exhaust / FIC SS Injectors / MSD Coils / Lightweight Pulleys / Corey tuned B & M Shifter / Aluminum Flywheel / Samco Hoses / Shelby Series One's / C4 No Flex Frame Stiffener BBC - Bling By Carter: Custom ZR-1 Center Caps / Custom Plenum Plate / Air Box Knobs / TB Cover / Oil Filter Cover |
03-19-2013 | #10 | |
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,797
|
Re: Interesting oil test write-up
Quote:
As I recall he had a Timing Chain broken which is really rare. See Highest/Lowest mileage There are two in that poll that are over 200,000 miles.
__________________
Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 03-19-2013 at 10:43 AM. |
|
Thread Tools | |
Display Modes | |
|
|