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Lubrication and Lubricants You guessed. Here is where everyone can argue over oil.

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  #11  
Old 30th November 2022
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Default walmart castrol

Quote:
Originally Posted by Sporty1989 View Post
So, as I stated in my introduction, I have a 89 Sportster that has been well maintained by me and the previous owners. I was at walmart to get engine oil for it and noticed they didn't have any 20w-50 conventional motorcycle oil for it, all synthetic. Now my question is can I just switch over to synthetic oil instead of using the old fashioned oil? I heard that if your seals are not 100% that it will develop a leak then since synthetic will clean up all the old crude.

Bike has 27k on it now and bought it with 17k. Doesn't leak or use a drop of oil.
walmart has castrol 20w-50 petroleum based oil with high zinz content for 6.98 a quart. Absolutely perfect for big inch air cooled motors in the Sportsters not gtx

Last edited by wardie; 30th November 2022 at 20:18..
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  #12  
Old 30th November 2022
John Harper John Harper is offline
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I use Castrol GTX 20W50 as well. Can't go wrong.

John
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  #13  
Old 30th November 2022
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Default

Your choice.

You can switch right over to synthetic or use dino if you want

80's/90's common saying was it would cause problems, which I don't believe is true.

Castrol has always been good oil in my opinion
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  #14  
Old 1st December 2022
Tomcatt Tomcatt is offline
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Quote:
Originally Posted by Steve9 View Post
80's/90's common saying was it would cause problems, which I don't believe is true.
The first synthetics did leak badly. A (very) few also turned to jello when mixed with other oils. By the 80's that was past history but you did still hear it repeated.
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  #15  
Old 1st December 2022
wolfryder wolfryder is offline
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Default Oil

20/50 gtx castrol for 40 plus years
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  #16  
Old 1st December 2022
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Quote:
Originally Posted by Tomcatt View Post
The first synthetics did leak badly. A (very) few also turned to jello when mixed with other oils. By the 80's that was past history but you did still hear it repeated.
Ok

That makes sense
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