Honda's like thick or Thin oil?

Discussion in 'General Motoring' started by Phil Budgell, May 3, 2005.

  1. Phil Budgell

    Phil Budgell Guest

    I am going to be doing a 6 day, 7500 km run accross Canada next week. I have
    a 99 Accord 4 Cyl with 100k kms on the clock. Right now I use Mobil 5w30
    with slight consumption (ie. 1 Liter/7500 kms). I understand that Mobil is a
    "thin" 30 weight and have been considering making the switch to German
    Castrol 0w30 which is a "thick" 30. Has anybody used this oil before or even
    a 40 weight in their 2.3's? Will I experience any real drop in MPG and will
    I cause any harm to my engine by using a slightly thicker oil in my car? I
    am trying to strike a balance between Valvetrain protection and MPG. Any
    input is greatly appreciated.
    Phil Budgell, May 3, 2005
  2. You're valve train won't be under much stress on a long cruise like that. Go
    Steve Bigelow, May 3, 2005
  3. Phil Budgell

    jmattis Guest

    10W30. You won't need much start-up lubrication on a long cruise, so
    you don't need 0 or 5 on the front end even in Canada, eh? 10W30 will
    get you all the way through the trip without the additives starting to
    break down, something that 5W30's cannot do. Or can you get 10W30
    jmattis, May 3, 2005
  4. Phil Budgell

    y_p_w Guest

    I don't think that was the point. Not all XW-30 oils are of the
    same thickness.

    There are variations in the typical thickness of XW-30 oils depending
    on formula. The allowable variation in viscosity at at 100°C is from
    9.3 to 12.5 cSt. Mobil 1 5W-30 has a typical value of 10.0, while
    "German Castrol" 0W-30 has a typical value around 12. This "German
    Castrol" is a green-colored, gummi-bear scented 0W-30 oil that is
    labelled as meeting several German automakers' (Mercedes-Benz, VW/Audi,
    BMW, Porsche) specs as well as ACEA A3 (extended-drain). It is made
    in Germany and doesn't carry an "Energy Conserving" rating, and is
    relabelled as Castrol Syntec. A US made version of Castrol Syntec
    0W-30 doesn't meet those standards, does carry the EC rating, and
    is reputed to be about 10.5 cSt at 100°C.

    I believe that at cold startup at summer temps, this Castrol 0W-30
    might even be thicker than Mobil 1 5W-30. Also - I've heard from
    some sources that Mobil 1 no longer needs VI improver for its
    "SuperSyn" 5W-30, and that it holds its viscosity for a very long


    I'd stick with the Mobil 1 5W-30. It's good stuff and easy to
    find if you need to top off.
    y_p_w, May 3, 2005
  5. Phil Budgell

    SoCalMike Guest

    screw the MPG. any difference is negligable. stick with mobil1 5w30, IMO.
    SoCalMike, May 3, 2005
  6. Phil Budgell

    MAT Guest

    My 02 Civic Si/Sir loves the 5w30 Mobil 1. Since you have GC exposure you
    must have seen some M1 UOA's from BITOG. I caught the bug and sent off for
    an oil analysis. But for the most part, Honda I4's are pretty easy on oil
    and I don't think the thickness of GC will do anything for you. If anything
    run the new Mobil 1 EP, I have it in my crankcase now but the following UOA
    is from standard Mobil 1, which I have used consistently since about 18k,
    Castrol GTX before then for proper dino break in. My Mobil 1 OCI is between
    7500 and 9000 miles. As you can see, wear is extremely low. This car is
    not babied, but driven with best practices in mind like proper operating
    temperature and the occasional long highway cruise.
    MAT, May 3, 2005
  7. Phil Budgell

    y_p_w Guest

    ExxonMobil has reformulated Mobil 1 5W-30. The product data now says
    that the "typical properties" for regular Mobil 1 5W-30 include 11.3
    cSt (was 10.0) viscosity at 100°C. I've got one jug of SL-labelled
    Mobil 1 5W-30, and two SM. Of course I can't know if they might have
    made the switch before relabelling for API SM. Oil companies change
    the formulations of their products all the time without any relabelling.
    It wouldn't surprise me if Mobil started selling the API SM version
    before they could officially relabel as such.
    y_p_w, May 9, 2005
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.