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  1. scotnort75

    scotnort75

    Joined:
    May 26, 2016
    Wondering if I should use 20/50
    or straight 50 in my MK3 850
    this spring/summer.

    Would appreciate all input fellas.

    Cheers.
     
    Tags:
  2. Triton Thrasher

    Triton Thrasher

    Joined:
    Feb 10, 2009
    20W/50

    There is no doubt
     
  3. auldblue

    auldblue VIP MEMBER

    Joined:
    Nov 20, 2012
    Halfords classic does me , £15 with my Halford trade card.
     
  4. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Well there you have it Scotnort, which oil to use, all done and dusted in two replies.

    Or then again...
     
  5. Torontonian

    Torontonian

    Joined:
    Dec 28, 2009
    20/50 What kind. Here we go ...
     
  6. scotnort75

    scotnort75

    Joined:
    May 26, 2016
    If I use 20/50 , I'm thinking Penzoil
    as it is readily available at NAPA close by Torontonian.

    Cheers.
     
  7. scotnort75

    scotnort75

    Joined:
    May 26, 2016
    In my way to British Imports here in
    Vancouver to check out the 50 weight though.
    Don't know what brand it is yet.
     
  8. PJFlynn

    PJFlynn

    Joined:
    Apr 26, 2017
    Pennzoil is good shit.l use it in all my stuff
     
  9. RoadScholar

    RoadScholar VIP MEMBER

    Joined:
    Dec 28, 2008
    Ah, an oil thread; 'think I'll pop some corn...

    Scotnort75, this topic has had more scrutiny and discussion than Einstein's combined theories; I suggest that you learn the search function, but the cat is clearly out of the bag...

    But, I digress. I buy and refine peanut oil, add a 20 gram tube of zinc oxide to each gallon, 30 cc of Tide, a few cc of single malt, the rest for me, and there you have it: a very slippery, detergent, wear retarding and anti foaming; cheap too. If you want to be real efficient you can cook a turkey or a chicken in the peanut oil first.

    I apologize for raining on your parade, but my response may be gentle by comparison. I'm glad that you have come here to seek wisdom, as you can see I don't have much, but others are steeped in the stuff. Just a suggestion: before you ask about tires, batteries, electronic ignitions or any other subjects that have more than one alternative, do a diligent search.

    Best wishes!
     
    delagem, Nater_Potater and scotnort75 like this.
  10. auldblue

    auldblue VIP MEMBER

    Joined:
    Nov 20, 2012
    image.jpeg

    It's liquid engineering!!! Any oil is better than no oil when yer T160's drinkin faster than Ian Bothum on a night oot!!
     
    scotnort75 likes this.
  11. scotnort75

    scotnort75

    Joined:
    May 26, 2016
    LOL!

    Guess I better watch what I chose
    to post from now on.
    Don't want the forum polis
    gettin' their knickers in a twist.
     
  12. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Just make sure it’s got a decent amount of zinc / ZDDP in it. Or buy oil without it and use an additive.

    This is NOT in oils intended for modern vehicles with catalytic converters as it damages them. But it’s an additive designed to prevent cam and cam follower wear. Which is already a hot topic in these engines.

    And ignore roadscholars sarcastic reply. No one uses refined peanut oil, that’s just being silly. It’s an equal mix of peanut oil, virgin olive oil and cold pressed sunflower seed oil that we use. Check your bike for nut allergy first though...
     
  13. scotnort75

    scotnort75

    Joined:
    May 26, 2016
    LOL!

    I’ll check Rocky Point Cycle and see if they have any anti wet sump oil in stock!
     
  14. Triton Thrasher

    Triton Thrasher

    Joined:
    Feb 10, 2009
    The W in 20W/50 stands for Whale, so start by reading Moby Dick and practising shouting “Thar she blows!” from the crow’s nest.
     
    delagem, Nater_Potater and Fast Eddie like this.
  15. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
  16. acadian

    acadian

    Joined:
    Mar 5, 2010
    whatever oil floats your boat is the answer. Trying out synthetic straight 50W for the first time this season.
     
  17. Triton Thrasher

    Triton Thrasher

    Joined:
    Feb 10, 2009
    Since the introduction of the dolphin fairing.

    Or was that just a fluke?
     
    delagem and Nater_Potater like this.
  18. Danno

    Danno

    Joined:
    Feb 7, 2010
    I use Mobil 1 in everything I care about preserving. The 20W50 V-Twin oil works great in the old bikes. My ZX-14 has had a steady diet of the 10W40 (76,000+ trouble-free miles) and my 2012 F150 gets 8 qts of 5W20 or 5W30 depending on the season. 165,000+ miles and no mechanical issues.
     
  19. Joe Schlaberdowski

    Joe Schlaberdowski

    Joined:
    Jan 1, 2017
    Very interesting about the zink additive. I think straight 50 wt was just an accomodation for where most time and stress at the average ambient temperature would occur in an age of only single weight oils. Of course the weight of oil you choose is temperature dependent. But just what the machine wear dependency is is not clear to me. Maybe modern formulations can maintain a film preventing metal on metal contact at a lower weight at a same temperature as the older higher weight stuff. These things are in the realm of specialized papers I never read. I've wondered whether "wt" may refer not just to viscosity, but to the ability to maintain a metal seperating film up to a certain temperature. Is a modern 40 wt equivalent to an old 50 wt, or not? Dunno. Viscosity or film strength or whatever, you obviously don't need 50wt starting at 0°F oil temperature (if it was a water cooled engine nobody's going much over 212°F even in a pressurized system anyway). But in the air cooled Norton world riding around in Fairbanks has got to produce different max oil temperatures than riding in Saudi Arabia. Just a guess, but too high a weight for oil temperature has got to prevent oil from getting where it needs to fast enough. Multi wt better accomodates low and high temperature limits that's for sure. And just what is the lower wt/oil temp point anyway. Not found (yet) the thread here that addresses all of that. Just the standard stuff -- and peanut comedy too of course. Maybe it's not a big deal, but fun to write about before tinkering with some old machinery.
     
  20. lazyeye6

    lazyeye6 VIP MEMBER

    Joined:
    Feb 28, 2014
    Having read it in various oil threads, I've wondered about folks who "try out" any specific brand, type or weight of oil.
    How is a conclusion made? If the engine blows that oil is no good? Frankly, I've "tried out" several brands, types
    and weights of oil over the years and I'll be darned if I can tell any difference. The important thing is to have oil in
    the engine and change it frequently. FWIW, I use Mobil 1 20W50 V-Twin oil exclusively in my Commando. Others
    swear by different brands and configurations. It's all good.
     
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