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best oil choice/preference

Discussion in 'XJ Technical Chat' started by kapo723, Apr 17, 2013.

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  1. kapo723

    kapo723 Member

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    Almost done with my maxim. Time for an oil change, I'm just curious to see what oil everyone suggests as well as what rear oil. Was probably gonna use Castrol 10-40 synthetic. And Castrol 75-90 synthetic for the rear. thoughts?
     
    kapo723, Apr 17, 2013
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  2. waldo

    waldo Member

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    Its no no no synthetic. Dyno, Dyno, Dyno, Is that enough NO'S Fitz? I feel like I could have done one more but was not sure.
    Okay enough bustin your chops Fitz Ill be good for a while. Promise
     
    waldo, Apr 17, 2013
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  3. kapo723

    kapo723 Member

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    Is there a reason not to use synthetic? Also what then do you use?
     
    kapo723, Apr 17, 2013
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  4. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Synthetics and current automotive oils are literally TOO "slippery." Both have a habit of causing starter clutch and drive clutch issues.

    Motorcycle-specific oils do not contain the same friction modifiers and thus are recommended.

    The factory recommends 20W40; that can be difficult to find. You can use 20W50 with no issues. Motorcycle-specific conventional oil like Castrol 4T is widely available.
     
    bigfitz52, Apr 17, 2013
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  5. kapo723

    kapo723 Member

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    I just read this from another post...
    http://www.calsci.com/motorcycleinfo/Oils1.html
    I'm not arguing, just know a lot of ppl who swear by amsoil or rotella t15w 40 Synthetics for motorcycles. This article seems to support synthetics.
    I'm torn between Castrol 4T and Rotella T 15w-40
     
    kapo723, Apr 17, 2013
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  6. KrS14

    KrS14 Active Member

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    KrS14, Apr 17, 2013
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  7. Foolber

    Foolber Member

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    Foolber, Apr 17, 2013
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  8. Ground-Hugger

    Ground-Hugger Member

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    What about Lucas motorcycle oil it meets or exceeds the following:
    API SM, SL, SJ, SH, SG, SF, CC, CD, JASO MA/MA-2, and ACEA A3
     
    Ground-Hugger, Apr 17, 2013
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  9. Foolber

    Foolber Member

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    Yea i use lucas products like crazy

    mostly Lucas, Bel-Ray, and Yamalube
     
    Foolber, Apr 17, 2013
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  10. maz43

    maz43 Member

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    I'm not picky about oil in the bike as long as it is Castrol 4T 20w50.
     
    maz43, Apr 17, 2013
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  11. Polock

    Polock Well-Known Member

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    Mobil Delvac1300
     
    Polock, Apr 17, 2013
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  12. tabaka45

    tabaka45 Well-Known Member

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    Amsoil synthetic motorcyle oil, 20W50 with not issues. However, unless you are really rough on the engine I think any brand name 20W50 motorcyle oil should be fine. I wouldn't put any non-motorcycle specific oil in my bike.
     
    tabaka45, Apr 17, 2013
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  13. Krafty

    Krafty Member

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    im trying out 15w40 this year just to see what its like.

    previously ive always used castrol
     
    Krafty, Apr 17, 2013
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  14. Super

    Super Member

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    This has been discussed in several forums, my choice is Rotella T, 15-40 non-synthetic diesel. I buy it by the 18l pail from Canadian Tire or WalMart when it goes on sale. I've been using it for years (during the summer) in several cars, both bikes, a 12cylinder jag etc without any issues.

    Rotella is a favorite of many here I believe, and meets motorcycle wet clutch requirements.
     
    Super, Apr 17, 2013
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  15. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    ONE of my XJ's can't tolerate synthetic, (the 900) but the other (750) can.
    It's the starter clutch that slips, not the tranny clutch.

    But other people's XJ's have different issues,

    Which is why the only "safe" advise is to say " DINO JUICE " for everyone.

    For those willing to experiment, be ready to dump your expensive AmsOil out almost immediately, and replace it with some Rotella - T.
     
    TIMEtoRIDE, Apr 17, 2013
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  16. kapo723

    kapo723 Member

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    I think I'll just go to autozone and see what oils they have. Rotella or Castrol sound his to me. Any specifics for the rear?
     
    kapo723, Apr 18, 2013
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  17. Foolber

    Foolber Member

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    Foolber, Apr 18, 2013
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  18. Super

    Super Member

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    Correction (because I just changed my oil/filter) the big "pail" of Rotella T 15-40 is 18.9 litres which for the non-metric folks is 5 US gallons.
     
    Super, Apr 18, 2013
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  19. kapo723

    kapo723 Member

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    Okay guys, thanks to everyone who input on this discussion. I just got back from the stores.. as per fitz I got the Castrol 4T, but after I got home I realized it is also synthetic!? So looks like I'm going synthetic anyhow. As for the rear, I got Vavoline 75w-140 full synthetic gear oil. Again Thx to everyone :)
     
    kapo723, Apr 18, 2013
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  20. 750E-II_29Rbloke

    750E-II_29Rbloke Active Member

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    Hope the synth works out for you. Just be prepared to do several quick oil changes with mineral oil at the first sign of starter or drive clutch slippage, if it does affect your bike then the sooner you get it out of there the less chance of damage...
     
    750E-II_29Rbloke, Apr 19, 2013
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