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#1962427 - 07/22/10 06:09 PM 20w50 low temp range?
aub Offline


Registered: 02/22/10
Posts: 13
Loc: Iowa
Can I get away using 20w50 with out doing damage at temps down to 40 degrees Fahrenheit. Reason I ask is I found a 20w50 oil with fair ZDDP numbers.

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#1962438 - 07/22/10 06:19 PM Re: 20w50 low temp range? [Re: aub]
rpn453 Offline


Registered: 11/06/02
Posts: 4842
Loc: Saskatchewan
Not a problem. The lower limit for a 20W is -4F.
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#1962467 - 07/22/10 06:41 PM Re: 20w50 low temp range? [Re: rpn453]
Eddie Offline


Registered: 12/07/03
Posts: 8038
Loc: Florida, Cape Coral
You might want to check the oil manufactures website and look at the product data sheet. You don't say what vehicle/engine but, a 20w50 oil is not usually used in any modern vehicle. I would imagine that start up wear would be bad at temps below 30 or 40F.
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#1962500 - 07/22/10 07:16 PM Re: 20w50 low temp range? [Re: Eddie]
dparm Offline


Registered: 04/19/10
Posts: 12945
Loc: Chicago, IL
40 degrees is fine. Is there a reason you want 20w50? You could go for a 15w50 and get a bit more low-temp performance.
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#1962512 - 07/22/10 07:22 PM Re: 20w50 low temp range? [Re: Eddie]
rpn453 Offline


Registered: 11/06/02
Posts: 4842
Loc: Saskatchewan
Originally Posted By: Eddie
I would imagine that start up wear would be bad at temps below 30 or 40F.


A 0W at -40F is much thicker, yet most here only run 5W in automotive engines and get good life out of them.
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#1962599 - 07/22/10 08:39 PM Re: 20w50 low temp range? [Re: rpn453]
aub Offline


Registered: 02/22/10
Posts: 13
Loc: Iowa
thanks for the info. I will be trying this in an air cooled single cylinder motorcycle. I never ride if its colder than 40F out. Kendall GT1 20w50 it has better ZDDP levels than Yamalube, Suzuki,Kawichem, or Honda GN4 at half the price.

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#1962656 - 07/22/10 09:16 PM Re: 20w50 low temp range? [Re: aub]
fuel tanker man Offline


Registered: 08/04/04
Posts: 1341
Loc: wytheville, va
maybe so... but there's a lot more to a good oil than gobs of zinc/phos...

...that said, the Kendall is probably at least as good as the cycle branded oils you mention.

Dan

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#1962839 - 07/23/10 02:07 AM Re: 20w50 low temp range? [Re: fuel tanker man]
Scooter_man Offline


Registered: 03/24/10
Posts: 294
Loc: Missouri, USA
For an air-cooled single cylinder bike, it's hard to beat Rotella T 15w40. And it's good for as cold as you probably want to ride anyway.

Used it for years (ATVs/Bikes/Scooters/OPE/etc.), never a problem.


Edited by Scooter_man (07/23/10 02:09 AM)
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