Announcement

Collapse
No announcement yet.

Which Engine Oil

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • erikm54life
    replied
    In the past I too used Liqui Moly 10w-60 for my stock M3. I was getting some brief tensioner rattle upon start up and I switched to Liqui Moly 10w-40. In both cases I always use either Ceratec ( every third oil change) or Liqui Moly Oil Additive ( in between use of Ceratec).

    With the 10w-40 in my S14 the tensioner rattle has disappeared.

    Could be time for a new tensioner too

    Leave a comment:


  • JimK
    replied
    Not many miles on the Swepco between changes. Only thing worth looking at are the wear metals. Swepco must blend the oil on the thin side. 12 cSt is the minimum for 40.

    Leave a comment:


  • Narayan3
    replied
    Swepco 15W40 since the engine rebuild in 2010. So far so good! Here's the oil analysis you can see the Zinc levels...
    Attached Files

    Leave a comment:


  • mwagner10702
    replied
    Originally posted by ADA///M View Post
    . . . compared to the spec 40w.
    The spec is 15W40 OR 15W50 per the supplemental manual.

    Leave a comment:


  • El KuRLy
    replied
    Originally posted by ADA///M View Post
    I believe 15w-40 was the spec for our cars.

    My car is relatively stock, so I run a 0w (or 5w)-40. Usually Shell Rotella.

    Not sure why we'd want anything thicker unless the engine wasnt stock internally or had other issues to overcome.

    T6 I take it?
    Do you add any additives?
    Thanks!

    Leave a comment:


  • ADA///M
    replied
    Would love to see the oil pressure logs vs rpm for various weights since everyone seems to use 50w or higher, compared to the spec 40w.

    Leave a comment:


  • mwagner10702
    replied
    I think it has to do with ZDDP levels. Their conventional diesel oil has ZDDP levels ~1450 ppm. Their T6 synthetic is ~1180 ppm. This is not the full story however. Rotella Diesel oil has less wear properties and should not be used in high performance engines like ours. It has something to do with "Load Carrying Capacity / Film Strength" which correlates to protection properties. All a bit above my pay grade honestly.

    I figure diesel engine oil is formulated for diesel engines and my OCD won't allow me to put that oil in my S14.

    Leave a comment:


  • mlytle
    replied
    it seems that instead using oil designed for high performance car engines, people are using oil designed for slow speed diesel truck engines. sooo...what is behind this fad? is there any science?

    Leave a comment:


  • mwagner10702
    replied
    From my M3 Supplementary Owner's Manual

    Click image for larger version

Name:	Oil.jpg
Views:	201
Size:	23.4 KB
ID:	1290517

    Leave a comment:


  • ADA///M
    replied
    I believe 15w-40 was the spec for our cars.

    My car is relatively stock, so I run a 0w (or 5w)-40. Usually Shell Rotella.

    Not sure why we'd want anything thicker unless the engine wasnt stock internally or had other issues to overcome.

    Leave a comment:


  • Mick
    replied
    That's why I asked. 3k is too high and it would be impossible to get the levels right with any additive. As I understand too much leads to sludge.

    Leave a comment:


  • mwagner10702
    replied
    I read somewhere that too much ZDDP can be as harmful to your engine as not enough. I'd be careful when adding ZDDP to any oil in an attempt to raise levels. Most major oil companies recommend against adding anything to their oils in part because adding anything will upset the carefully balanced additive package. In some instances adding ZDDP significantly reduced the oil’s wear prevention capability - contrary to what was promised.

    Leave a comment:


  • Mick
    replied
    Originally posted by First E30 M3 View Post
    https://www.hemmings.com/stories/201...-older-engines

    https://www.utterpower.com/epa-pushi...t-of-lube-oil/


    I have done quite few tests at BlackStone, Castrol 10W60, Motul 10W60, Luquil Moly 10W60, Mobil 15W50 Red Cap, Liquil Moly 5W-40 all of these oils do contain ZDDP under 1000 matching the EPA regulations somewhere between 700-850ppm of zddp.

    There is oil that is produced by Mobil which absolute not known to US people. Mobil-1 10W60 is available only Outside of USA.

    That Mobil-1 contains about 1200ppm of zddp and (forgot the number) molybdenum which will not meet the US/EPA standards and why one will never find this oil in US continent.

    But but but oils like Red Line 10W60 which contains zddp about 1200zddp are considered "Off-Road" and why they are advert like that. Just like the 16oz. Red Line zddp I purchase called 'Brake-In" additive which is not considered Oil and why it is available to be sold for public.

    This is the Mobil-1 10W60 which is not available for US continent https://www.mobil.com/en-GB/Passenge...ded-Life-10W60
    Have you looked into any of the zddp additives like this? https://www.amazon.com/dp/B01LZ4M2BA/
    It says a bottle to 6qts gets it to 3000ppm

    Leave a comment:


  • Das Boots
    replied
    I'm using Dino Total 20w-50 as recommended by my s14 mechanic after the engine overhaul.

    Leave a comment:


  • First E30 M3
    replied
    https://www.hemmings.com/stories/201...-older-engines

    https://www.utterpower.com/epa-pushi...t-of-lube-oil/


    I have done quite few tests at BlackStone, Castrol 10W60, Motul 10W60, Luquil Moly 10W60, Mobil 15W50 Red Cap, Liquil Moly 5W-40 all of these oils do contain ZDDP under 1000 matching the EPA regulations somewhere between 700-850ppm of zddp.

    There is oil that is produced by Mobil which absolute not known to US people. Mobil-1 10W60 is available only Outside of USA.

    That Mobil-1 contains about 1200ppm of zddp and (forgot the number) molybdenum which will not meet the US/EPA standards and why one will never find this oil in US continent.

    But but but oils like Red Line 10W60 which contains zddp about 1200zddp are considered "Off-Road" and why they are advert like that. Just like the 16oz. Red Line zddp I purchase called 'Brake-In" additive which is not considered Oil and why it is available to be sold for public.

    This is the Mobil-1 10W60 which is not available for US continent https://www.mobil.com/en-GB/Passenge...ded-Life-10W60

    Leave a comment:

Working...
X