Castrol semi syn 20w-40 - Victory Forums - Victory Motorcycle Forum
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post #1 of 44 (permalink) Old 08-26-2014, 10:06 AM Thread Starter
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Default Castrol semi syn 20w-40

SO I was using this in my Jackpot and it was great oil (Castrol Actevo 20w-40 semi-synthetic) and much better priced than Vic brand. I was going to stock up on some for when my new XC started needing oil changes but was unable to find it anywhere, even online. I emailed Castrol finally yesterday and got this response:

Quote:
Thank you for contacting Castrol North America.



Castrol Act-evo X-TRA 4T 20W-40 has been discontinued.



We apologize for any inconvenience this may cause.


Castrol Consumer Relations
They have not given any further info on why they discontinued it. May have to try the Shell Rotella T now if I can find it at my Walmart now as I am not a fan of 60 dollar oil kits. This is being posted as an FYI to my fellow forum members, not to start a oil thread war.

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post #2 of 44 (permalink) Old 08-26-2014, 10:17 AM
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They still make 10w-40. It will be a little thinner on start up which is not a bad thing. It will get into the engine a little quicker this way and have better protection on start up.

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post #3 of 44 (permalink) Old 08-26-2014, 10:22 AM Thread Starter
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Understood, but why would they run the 20 weight stock then? There must be a reason for it.

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post #4 of 44 (permalink) Old 08-26-2014, 10:31 AM
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Amazon might have it.

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post #5 of 44 (permalink) Old 08-26-2014, 10:57 AM Thread Starter
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Originally Posted by vindex1963 View Post
Amazon might have it.
I checked amazon for the Castrol and they no longer have any remaining stock. As for the Rotella I have seen it there. I've followed your posts on Rotella for a while now Vindex and I feel confident enough in it not blowing my motor to give it a shot.

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post #6 of 44 (permalink) Old 08-26-2014, 11:06 AM
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Please don't do anything on my account do your own research. I only know what works for me.

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post #7 of 44 (permalink) Old 08-26-2014, 11:10 AM
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In my book, research = doing + observing. I shall research for my next oil change



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post #8 of 44 (permalink) Old 08-26-2014, 11:11 AM
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Quote:
Originally Posted by JackPt View Post
Understood, but why would they run the 20 weight stock then? There must be a reason for it.
A lot of manufactures recommend this weight. I think they carried it to get some of the business from people who are strictly by the book. But there just must not have been enough business for this weight. I have always felt that manufactures recommend this weight to get people to use their brand oil. There just is not many companies that sell it so if you want to go by the book, now you must get oil from the motorcycle manufacture. If you know about oil, you know that using an oil with a lower front number is perfectly safe in a motorcycle.

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post #9 of 44 (permalink) Old 08-26-2014, 11:23 AM
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Originally Posted by broggyr View Post
In my book, research = doing + observing. I shall research for my next oil change
That's why I do the lab tests.

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post #10 of 44 (permalink) Old 08-26-2014, 02:07 PM
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Quote:
Originally Posted by JackPt View Post
Understood, but why would they run the 20 weight stock then? There must be a reason for it.
The higher the viscosity of the base oil, the less viscosity modifier material needs to be added to get the oil to perform like 40wt when it's warm.

This has been covered before but for anyone that may not have seen it, 10W-40 does NOT mean 40 weight oil that acts like 10 weight in the "winter". What it means is that a 10 weight base oil has viscosity modifiers in it that allow it to maintain viscosity when hot equivalent to a 40 weight base oil.

Viscosity modifiers are long chain polymers that bunch up when cold and stretch out when hot. The problem is that those long chains are subject to shearing and breaking as they flow around various engine components. In the 90% of motorcycle models on the road that have integrated transmissions and engines, the oil also lubricates the gears which is where a lot of the shearing takes place. As the viscosity modifiers break up over time, the base oil viscosity remains the same but the hot viscosity drops closer and closer to that of the base oil. So over time what you end up with is oil that starts out thin (good for starting a cold engine) but ends up REALLY thin when up to temp (bad for a hot engine).

By using a thicker base oil, less modifier material is needed to get that 40 weight hot performance. That means there's fewer chains to break up and the oil will stay thicker over time.

With frequent changes this is a non-issue. Also, synthetic oils by nature are more viscosity stable and require less viscosity modifier material to be added so again, they will maintain viscosity better over time.

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