Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 02-01-2010, 01:16 PM
Registered User
Join Date: Jul 2006
Posts: 184
Question good information (maybe)

hey guys, gals,

im in marfa tx and ran into a mercedes guy who told me to run pennzoil 10w-30 (sl) in my block based on zinc?

he also said it had to be black label pennzoil instead of yellow label(sm or sadomasochism, as he termed it).

the reason he said is that the (sm oil) will play havoc with the rockers....

note- the sl/sm is on the back of the bottle in a small circle.....

is this good information or horse hockey....


Reply With Quote
Old 02-01-2010, 01:36 PM
DCINSU's Avatar
Registered User
Join Date: Jan 2010
Location: Hburg PA
Posts: 51
As long as you are running approved oil you should not have a problem.
Reply With Quote
Old 02-01-2010, 04:49 PM
I told you so!
Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,852
Lyle, what are you driving?... what is the tappet design of the engine?... flat tappets or roller followers?

SL oil has more ZDDP (zinc) than SM oil, which is better for tappet designs, but not necessarily a "must-have" unless the engine is running a hot cam with high spring tensions, such as an altered engine. SM oils have enough ZDDP content for most engine applications.

Though there is a smidgen of truth to what he said, he was throwing his weight around more than anything else. Spend some time on and you'll get details on this issue.
Reply With Quote
Old 02-01-2010, 06:11 PM
Registered User
Join Date: Jan 2003
Location: Dallas
Posts: 792
Yeah, at some point, in the early eighties I think, MB changed the composition of the cam lobes and rocker arm surfaces to be more tolerant of the lower-zinc, emmissions-friendly oil formulations. I'm sure some of the guys on here have better memories of the timeframe than me. But, any engine less than 20 years old should certainly not be affected by the current low-zinc oils.

Reply With Quote
Old 02-01-2010, 07:23 PM
Registered User
Join Date: Sep 2009
Location: Great State of Texas
Posts: 440
There's a lot of hoopla surrounding Zinc, ZDDP, etc... especially when it comes to breaking in new (non-stock) flat-tappet motors.

You can either take a class from a triboligist like Kevin McCartney, or just use what the manufacturer tells you to; simple as that. If you want to use something different, forget the SAE and ILSAC standards and look for ACEA certifications on the bottle.

Also, while has a lot of good info, it's not the end-all-be-all. If you really want to compare oils, just go to their websites and get the MSDS/tech sheets. You might also try out and get your oil analyzed to see what's actually going on instead of just guessing.

A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.
Reply With Quote


Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 01:03 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page