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oil: 10w/40 or 15w/50

2456

Comments

  • busenbust
    busenbust Posts: 4,782 Forumite
    thank you all you fabulous people!!:)

    15w/50 asda brand it is!
  • TiTheRev
    TiTheRev Posts: 3,215 Forumite
    LandyAndy wrote: »
    Are you sure.

    Modern oils like 5w/30s seem a lot runnier than the 20w/50 I put in the Landy.
    Exactly! The 5w30 is a higher viscosity than the 20w50...
    :A Luke 6:38 :A
    The above post is either from personal experience or is my opinion based on the person God has made me and the way I understand things. Please don't be offended if that opinion differs from yours, but feel free to click the 'Thanks' button if it's at all helpful!
  • LandyAndy
    LandyAndy Posts: 26,377 Forumite
    Part of the Furniture 10,000 Posts
    http://www.autoeducation.com/autoshop101/oil-change.htm

    or

    http://auto.howstuffworks.com/question164.htm
  • LandyAndy
    LandyAndy Posts: 26,377 Forumite
    Part of the Furniture 10,000 Posts
    TiTheRev wrote: »
    Exactly! The 5w30 is a higher viscosity than the 20w50...

    Viscosity. A runnier oil has a lower viscosity than a thicker one. So 5w/30 is runnier, so has a lower viscosity.
  • busenbust
    busenbust Posts: 4,782 Forumite
    TiTheRev wrote: »
    Actually no :rolleyes:
    :confused:

    Oh no, I thought i was onto a winner! Any Consensus ? I really don't want to ruin the engine.
  • TiTheRev
    TiTheRev Posts: 3,215 Forumite
    It's all semantics ;) get the 15w40 or 15w50.

    My understanding = 5w30 is 5 when warm, 30 when cold, thus a thicker oil will help the more worn engine.
    :A Luke 6:38 :A
    The above post is either from personal experience or is my opinion based on the person God has made me and the way I understand things. Please don't be offended if that opinion differs from yours, but feel free to click the 'Thanks' button if it's at all helpful!
  • LandyAndy
    LandyAndy Posts: 26,377 Forumite
    Part of the Furniture 10,000 Posts
    busenbust wrote: »
    :confused:

    Oh no, I thought i was onto a winner! Any Consensus ? I really don't want to ruin the engine.

    Read this.

    http://auto.howstuffworks.com/question164.htm


    Runny = low viscosity

    Thick = high viscosity

    20W/50 is the way to go.
  • LandyAndy
    LandyAndy Posts: 26,377 Forumite
    Part of the Furniture 10,000 Posts
    TiTheRev wrote: »
    It's all semantics ;) get the 15w40 or 15w50.

    My understanding = 5w30 is 5 when warm, 30 when cold, thus a thicker oil will help the more worn engine.

    If by semantics you mean understanding what a word means I agree with you;) .
  • TiTheRev
    TiTheRev Posts: 3,215 Forumite
    Apologies for the confusion Landy ;)
    :A Luke 6:38 :A
    The above post is either from personal experience or is my opinion based on the person God has made me and the way I understand things. Please don't be offended if that opinion differs from yours, but feel free to click the 'Thanks' button if it's at all helpful!
  • espresso
    espresso Posts: 16,448 Forumite
    Part of the Furniture 10,000 Posts Combo Breaker
    TiTheRev wrote: »
    It's all semantics ;) get the 15w40 or 15w50.

    My understanding = 5w30 is 5 when warm, 30 when cold, thus a thicker oil will help the more worn engine.

    Your understanding is wrong then!
    The SAE designation for multi-grade oils includes two grade numbers; for example, 10W-30 designates a common multi-grade oil. Historically, the first number associated with the W (again 'W' is for Winter, not Weight) is not rated at any single temperature. The "10W" means that this oil can be pumped by your engine as well as a single-grade SAE 10 oil can be pumped. "5W" can be pumped at a lower temperature than "10W" and "0W" can be pumped at a lower temperature than "5W". The second number, 30, means that the viscosity of this multi-grade oil at 100°C (212°F) operating temperature corresponds to the viscosity of a single-grade 30 oil at same temperature. The governing SAE standard is called SAE J300.
    :doh: Blue text on this forum usually signifies hyperlinks, so click on them!..:wall:
This discussion has been closed.
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