Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 Tech
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C5 Tech
Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace Sponsored by
Karl Chevrolet

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 07-09-2005, 09:00 PM   #1
007rollie
CF Senior Member
 
Member Since: Apr 2003
Location: lexington ky
Default MOBIL 1 20-50 Damage my engine?

I have ran MOBIL 1 20-50 in several C4 Corvettes that I have owned in the past. Is this to heavy for LS1 ENGINE? Anyone running 20-50 in there C 5 ?

Last edited by 007rollie; 07-09-2005 at 09:01 PM. Reason: MISS SPELLING
007rollie is offline   Reply With Quote
Old 07-09-2005, 09:35 PM   #2
screw991le
CF Senior Member
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
 
screw991le's Avatar
 
Member Since: Sep 2004
Location: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!
Send a message via MSN to screw991le
Default

Kinda thick?
screw991le is offline   Reply With Quote
Old 07-09-2005, 09:46 PM   #3
silverz06vette
CF Senior Member
 
silverz06vette's Avatar
 
Member Since: Aug 2002
Location: South
Default

LPE and other tuners say to if you are modded like a H/C package.

Mobil 1 5/10w-30 or any other good oil (amsoil, redline) will do just fine in your C5.

15w-50 does not flow that well when its cold out, so for cold starts in the winter I would not use it at all.
silverz06vette is offline   Reply With Quote
Old 07-09-2005, 09:49 PM   #4
GUSTO14
CF Senior Member
 
GUSTO14's Avatar
 
Member Since: Sep 2003
Location: eastern NC
Default

Quote:
Originally Posted by 007rollie
I have ran MOBIL 1 20-50 in several C4 Corvettes that I have owned in the past. Is this to heavy for LS1 ENGINE? Anyone running 20-50 in there C 5 ?
It certainly isn't gonna hurt anything, but it will probably cost you a few horsepower...

Unless you have a very loose engine, I can't imagine why you'd want to run this heavy an oil. But again, it isn't gonna hurt anything.

GUSTO
GUSTO14 is offline   Reply With Quote
Old 07-10-2005, 12:17 AM   #5
eddie44
CF Senior Member
St. Jude Donor '03
 
eddie44's Avatar
 
Member Since: May 2003
Location: Hells Sister City Phoenix AZ
Default

Unlike most here on the Forum I run 10w-30 in mine but I'm in 115 degree heat right now. I think it thins out in that kinda of temps. Not sure I'd run something as thick as 20w-50. As someone else said I'd be afraid of cold starts.
eddie44 is offline   Reply With Quote
Old 07-10-2005, 12:54 AM   #6
GrayC5
CF Senior Member
 
GrayC5's Avatar
 
Member Since: Nov 2003
Location: Mustang OK
Default

Quote:
Originally Posted by 007rollie
I have ran MOBIL 1 20-50 in several C4 Corvettes that I have owned in the past. Is this to heavy for LS1 ENGINE? Anyone running 20-50 in there C 5 ?
Certainly not recommended by the Owners Manual and the GM Service Manual. My '03 Owner's Manual and Service Manual specifically state not to use SAE 20W-50. Only recommended viscosity is SAE 5W-30 in a synthetic that meets GM Standard 4718M. The Mobil 1 synthetic 5W-30 used to fill the C5 engines at the factory meets this standard. The Owner's Manual says you may substitute SAE 10W-30 when the temperature is expected to remain above 0 degrees F and the 5W-30 is not available. You should see your Owner's Manual for more details.
__________________


2013 CRM/Ebony Grand Sport
MZ6 3LT PYE NPP T43 QB1 R8C
NCM Delivery 10/12/2012
NCM Life Member




Gone But Not Forgotten:
2003 MSG/BLK/BLK Vert
MN6, 1SB, Z51, B84, QF5, R8C, Z06 Ti Exhaust
NCM Delivery 4/14/2003
GrayC5 is offline   Reply With Quote
Old 07-10-2005, 01:17 AM   #7
Dave68
CF Senior Member
 
Dave68's Avatar
 
Member Since: Dec 2000
Location: San Diego CA
Default

5W-30, 0W-30, or 0W-40 are the only oil viscosities I'd use. 20W-50 may very well cause premature engine wear due to its poor flow characteristics at startup temps.
__________________


2001 Mag-Red Coupe 6-Speed, 1SC, Z51, Born: May 17, 2001, delivered June 7th, 2001
315.9 RWHP 337.7 RWTQ (Dynojet) 6/8/02 (no mods)
328.8 RWHP 352.2 RWTQ (Dynojet) 5/22/04 with Halltech Stinger intake and CAI mod
Quad Round Borla Stingers 9/6/03
2002 Z06 airbox, 2013
Cold-air scoop mod 5/20/04
TPS Z06 shifter (replaced BPP on 12/26/11)
Intake install, oil trap, and CAI mod: http://www.conceptualpolymer.com/corvette_c5_corner.htm
Dave68 is offline   Reply With Quote
Old 07-10-2005, 01:41 AM   #8
Tom73
CF Senior Member
 
Tom73's Avatar
 
Member Since: Apr 1999
Location: Central Texas
Default

Quote:
Originally Posted by GUSTO14
It certainly isn't gonna hurt anything, ....
You sure? Most engine wear occures at start-up so running a thick mud like that will cause it to take longer to get the oil to the critical parts.

tom...
Tom73 is offline   Reply With Quote
Old 07-10-2005, 02:05 AM   #9
7.0sc SuperVette
CF Senior Member
Support Corvetteforum!
 
7.0sc SuperVette's Avatar
 
Member Since: Oct 2002
Location: Sunny Earthquake Country, USA On the Left Coast (which is becoming more Right!)
Default Castrol 5W-50 synthetic...

Quote:
Originally Posted by 007rollie
I have ran MOBIL 1 20-50 in several C4 Corvettes that I have owned in the past. Is this to heavy for LS1 ENGINE? Anyone running 20-50 in there C 5 ?
I have been running Castrol 5W-50 synthetic (GM4718M approved) in my LS1/2 engines under the assumption that under cold start conditions it will act like a 5W oil viscosity and at high oil temps it will act like oil in the 30 to 50 viscosity range depending on temperature.

I do this based on what I have seen in the "literature" about maintaining oil pressure/flow at high temps with racing bearing and piston clearances.

This is a belief that I hold and not anything that I have done engineering tests on and the relative few "racing" type engines that I have built or more recently have had built have neither proven nor disproven my belief.

I would be interested in hearing Forum folk input on this.

May the BOOST be with you!

Roy
__________________
LS2 402 '97 C5, VORTECH T1 6.5 PSI. AandACorvette.Com.
AFR 205 heads, METH Injection, 11:1 C.R. LG 1 3/4" LT's.
FAST LSX manifold w/LS2 Throttle Body
224/228 .581/.588 115 Comp Xer.
RODNEY'S M6, 3.90 gear w/hardened shaft.
ZO6 springs, T1 bars, Bilstein Sports, QA1's.
18x10/11.5 CCW Streets, (275/305/35) Nitto NTO1/RII's.
Buy AMERICAN MADE Detroit IRON…er, ah…PLASTIC!
7.0sc SuperVette is offline   Reply With Quote
Old 07-10-2005, 06:42 AM   #10
AU N EGL
CF Senior Member
 
AU N EGL's Avatar
 
Member Since: Sep 2003
Location: Raleigh / Rolesville NC
Default

The heavey weight oils are for running in consistantly hot envornments. Road racing or track days where oil temp is 240* and above.

I also use an oil cooler and keep my oil temp 250-255* even on the hottest of days or the hardest of runs.

I use 15w-50
AU N EGL is offline   Reply With Quote
Old 07-10-2005, 08:40 AM   #11
jimcork1
CF Senior Member
 
jimcork1's Avatar
 
Member Since: Jan 2001
Location: Slidell La
Default

Quote:
Originally Posted by 007rollie
I have ran MOBIL 1 20-50 in several C4 Corvettes that I have owned in the past. Is this to heavy for LS1 ENGINE? Anyone running 20-50 in there C 5 ?
I used it in my Lincolns and drove them for 150,000 miles. Engines were in great shape when I sold them. Now I don't live where it gets below 20 F and the summers are easily 100 F. The lincolns were garaged at 60 minimum temp. So oil flow was not a problem. If you live in N Dakota I would not use the 20 50. If you have it in your car now it won't be much of an issue and might cost you 2 hp. I would not drain it just to change viscosity. So really it is your choice I don't think it will affect engine life if you live in the south,, but up north in winter might have some affect on a cold soaked motor. Just my $.02

99 Nassau Blue
jimcork1 is offline   Reply With Quote
Old 07-10-2005, 11:58 AM   #12
Bill Curlee
Tech Contributor
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Support Corvetteforum!
 
Bill Curlee's Avatar
 
Member Since: Jun 2001
Location: Gales Ferry CT
Default

Dude

You need to run 5-30 or 10-30 and forget about the race stuff!! Some times MORE is NOT better!

I live in the north east and run 5-30 in the winter and 10 -30 in the summer!

BC
Bill Curlee is offline   Reply With Quote
Old 07-10-2005, 11:02 PM   #13
davidp
CF Member
 
Member Since: Aug 2004
Location: Janesville Wisconsin
Default

I had LPE do a Heads and Cam package on my 03 ZO6. It included upgrading the oil pump, push rods and stands, timing chain, headers, x pipe etc. Their quote in the service instructions provided with all engine modifications from LPE is "During the summer months we recommend Mobil 1, 15W50 weight oil and during the colder months we recommend 10W30. The recommended period for oil change is every 3000 miles or 3 months which ever is sooner." If you prime the oil filter when changing the oil, upon startup there is plenty of oil available for proper lubrication. At idle I hold 80lbs of OP cold 70lbs with the oil at 198-210 degrees. It does not get hotter than that due to 160 thermostat and reprogramming of the fan motors. I do not get into the throttle until the oil has reached 190 again as recommended by LPE FWIW

Last edited by davidp; 07-10-2005 at 11:04 PM.
davidp is offline   Reply With Quote
Old 07-11-2005, 12:41 PM   #14
GUSTO14
CF Senior Member
 
GUSTO14's Avatar
 
Member Since: Sep 2003
Location: eastern NC
Default

Quote:
Originally Posted by Tom73
You sure? Most engine wear occures at start-up so running a thick mud like that will cause it to take longer to get the oil to the critical parts.

tom...
Tom,

Synthetic oil flows so well hot or cold, you would be hard pressed to detect a difference. I've spilled 90 weight synthetic gear oil on the garage floor and it flowed like 10w-30 motor oil. Put some in your freezer and see how "thick" it gets... you will be very surprised... and impressed.

I do agree with most everyone else, there is little reason to run a 20w-50 synthetic.

GUSTO
GUSTO14 is offline   Reply With Quote
Old 07-11-2005, 03:04 PM   #15
AU N EGL
CF Senior Member
 
AU N EGL's Avatar
 
Member Since: Sep 2003
Location: Raleigh / Rolesville NC
Default

Quote:
Originally Posted by GUSTO14
Tom,

Synthetic oil flows so well hot or cold, you would be hard pressed to detect a difference. I've spilled 90 weight synthetic gear oil on the garage floor and it flowed like 10w-30 motor oil. Put some in your freezer and see how "thick" it gets... you will be very surprised... and impressed.

I do agree with most everyone else, there is little reason to run a 20w-50 synthetic.

GUSTO
with GUSTO

I also use a 3 qt accu-sump to prelub the engine for 60 sec before cranking it over.
AU N EGL is offline   Reply With Quote
Old 07-11-2005, 03:17 PM   #16
Dave68
CF Senior Member
 
Dave68's Avatar
 
Member Since: Dec 2000
Location: San Diego CA
Default

Quote:
Originally Posted by GUSTO14
Tom,

Synthetic oil flows so well hot or cold, you would be hard pressed to detect a difference. I've spilled 90 weight synthetic gear oil on the garage floor and it flowed like 10w-30 motor oil. Put some in your freezer and see how "thick" it gets... you will be very surprised... and impressed.

I do agree with most everyone else, there is little reason to run a 20w-50 synthetic.

GUSTO
Gusto,

I spoke to a Mobil 1 applications/technical help person not too long ago. He told me that Mobil's testing has shown that startup wear occurs to a greater extent with synthetic oil weights higher than 5W, even at 70F startup temps. For this reason, he recommends nothing higher than 5W oils for every application except racing. In fact, the applications engineer lives in Texas and is using 0W-40 Mobil 1 in his car.

You may not be able to see a difference by the way the various oils pour, but engine wear does occur more rapidly when using the higher-grade stuff. Racers aren't concerned about getting 200,000 miles out of their engines. Short-term durability at super-high oil temperatures is their priority.
Dave68 is offline   Reply With Quote
Old 07-11-2005, 03:18 PM   #17
LRD VDR
CF Senior Member
 
LRD VDR's Avatar
 
Member Since: Jul 2004
Location: Dallas Texas
Default

Quote:
Originally Posted by 007rollie
I have ran MOBIL 1 20-50 in several C4 Corvettes that I have owned in the past. Is this to heavy for LS1 ENGINE? Anyone running 20-50 in there C 5 ?

How hot does it get in KY?

Here in Texas(Dallas) even Satan does not want to be here so I run 15w-50 Mobil 1 or RP 41 or even 51 when I do track events and I have Oil and Tranny coolers.

Shahram
LRD VDR is offline   Reply With Quote
Old 07-11-2005, 07:22 PM   #18
b98
CF Senior Member
 
Member Since: Aug 2003
Location: somwhere Texas
Default

Quote:
Originally Posted by LRD VDR
How hot does it get in KY?

Here in Texas(Dallas) even Satan does not want to be here so I run 15w-50 Mobil 1 or RP 41 or even 51 when I do track events and I have Oil and Tranny coolers.

Shahram
Same here I run 15/50 , it's not 50 when the oil is cold. And the word cold is not in the Texas redneck dictionary.
b98 is offline   Reply With Quote
Old 07-12-2005, 12:45 AM   #19
loudsam
CF Senior Member
 
loudsam's Avatar
 
Member Since: Feb 2004
Location: Country Boys Can Survive.
Default

Quote:
Originally Posted by 007rollie
I have ran MOBIL 1 20-50 in several C4 Corvettes that I have owned in the past. Is this to heavy for LS1 ENGINE? Anyone running 20-50 in there C 5 ?
I run 15w-50 in my LPE heads/cam '99 coupe. That's what Lingenfelter said to run in it.
loudsam is offline   Reply With Quote
Old 07-12-2005, 02:23 AM   #20
AmericanPie
CF Senior Member
 
Member Since: Mar 2002
Location: Camarillo California
Default

I just thought I'd point out that for my 1985 635CSi, BMW recommends 20W-50 from 15 to 120 degrees F. They only specify the lighter weight stuff (5W-20, 5W-30) up to about 20 degrees F. I know comparing the BMW M30 inline six to an LS-1 is like apples to oranges, but BMW motors aren't exactly known for having "loose clearances". And many BMW guys, using factory-specified oil viscosity, are getting well over a quarter million miles (some even over 500,000) before lower-end rebuild time. Most I know (including myself) are using synthetics.
AmericanPie is offline   Reply With Quote
Old 07-12-2005, 02:23 AM
 
Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 Tech
Reload this Page MOBIL 1 20-50 Damage my engine?
 
 
 
Reply

Tags
1550, 15w50, 20, 2050, 50, car, damage, engine, hurt, mobil, moble, motor, oil, race, weight


Thread Tools Search this Thread
Search this Thread:

Click for 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 03:38 AM.


Emails & Password Backup