An oil thread...perhaps - Kawasaki Versys Forum
 
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post #1 of 6 (permalink) Old 08-13-2013, 12:12 AM Thread Starter
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An oil thread...perhaps

Why - would you use 15w40 over 5w40 (beyond break in) if you had the choice?

As I understand it, the first number in any given multi-grade oil is the effective cold operating viscosity index and the second number is the effective hot (all the way warmed up + ambient temp) operating temp. So, if you're not wanting to change oils from summer to winter, and 5w is a lot more universal of a cold weight than 15w, or 20w for that matter, why would 15w or 20w ever be a better alternative than 5w in a liquid cooled engine that is subject to many cold start up situations?

There are some summer days here in East Texas where it's 80 or so in the morning, but in the winter it does dip below freezing on occasion, and as I understand it, 5w is plenty fine for either temp. So again, how is 15w, or 20w ever a viable alternative? I'm not saying it never is, I'm just truly curious.
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post #2 of 6 (permalink) Old 08-13-2013, 12:20 AM
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You actually wouldn't choose 15W-40 over 5W-40 because it wouldn't be a better choice. You will see 15W-40 grade in non-synthetic oil... I use 0W-40 synthetic oil.
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post #3 of 6 (permalink) Old 08-13-2013, 12:29 AM Thread Starter
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Ah, so 15w40 conventional is limited to what weight it can provide because it's conventional? Makes sense. I plan on following your (Invader) earlier advice about the T6 Rotella synthetic 5w40, when I actually do switch to synthetic on the V. I'm also putting it in my Caravan...hopefully this week. Seems like the best all around oil. Gonna stick a Wix oil filter on the van, probably a high-flo on the V.
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post #4 of 6 (permalink) Old 08-13-2013, 12:45 AM
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Throw in some 10W-40 high mileage oil in the Caravan... How old and how much mileage?

http://www.walmart.com/ip/Quaker-Sta...-5-qt/17128885
http://www.walmart.com/ip/Castrol-GT...-5-qt/17253560

Last edited by invader; 12-06-2015 at 08:34 PM.
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post #5 of 6 (permalink) Old 08-13-2013, 01:08 AM Thread Starter
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Not to take away from the V, but I am curious about the part synthetic stuff for the Caravan. Why wouldn't the Rotella T6 be good for the van? BTW, it has just a shade over 100k on it, paid for What do they put in the high mileage stuff to make it "high mileage"?
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post #6 of 6 (permalink) Old 08-13-2013, 01:41 AM
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High mileage oils contain seal conditioners to renew valve oil seals which have shrunk and hardened, and the main cause for your old Caravan's oil consumption. Castrol's 5W-30 GTX High Mileage oil's viscosity is also higher than average 5W-30 which may be enough if you were already ok with 5W-30 in it.

http://www.castrol.com/castrol/exten...tentId=7053315

Specs: http://www.google.ca/url?sa=t&rct=j&...CdJMYyI9rrf65Q

Yes, Rotella 6 synthetic 5W-40 would also be excellent for the van in your heat.

Last edited by invader; 08-13-2013 at 01:44 AM.
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