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#1540091 - 07/22/09 06:17 AM Re: Manual states 5w20 or 10w30? [Re: pzev]
ADFD1 Offline


Registered: 04/05/09
Posts: 1714
Loc: CA.
 Originally Posted By: pzev



I was simply making fun of a topic that seems to come up 20 times a day.
ow-40 like water? lol...


LOL seems everytime a 20wt oil is mentioned along with a 30wt the thick vs. thin wars begin. If it were my car and I was worried about 100* weather then I would run the suggested 30wt for the summer and run the 20wt in the winter. In reality the 20wt would work well year round. YMMV
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#1540130 - 07/22/09 07:23 AM Re: Manual states 5w20 or 10w30? [Re: ADFD1]
pzev Offline


Registered: 11/30/05
Posts: 601
Loc: arctic
20wt, thats thinner than water!!!!! For the summer I'll use a straight 50 weight, and for the winter I'll use a 20w-60, becuase you take 20-60 and you get -40...and it gets about that cold where I live....

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#1540304 - 07/22/09 11:03 AM Re: Manual states 5w20 or 10w30? [Re: pzev]
hate2work Offline


Registered: 09/04/08
Posts: 4617
Loc: Western Washington
 Originally Posted By: pzev
20wt, thats thinner than water!!!!! For the summer I'll use a straight 50 weight, and for the winter I'll use a 20w-60, becuase you take 20-60 and you get -40...and it gets about that cold where I live....


This post reminds me of saaber1's sig line :)
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#1540334 - 07/22/09 11:36 AM Re: Manual states 5w20 or 10w30? [Re: Johnny248]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
jdblya - We can't determine an admission that 10-30 is better because of the manual's statements. That is a real stretch.

It appears that for 98% of driving, the 5-20 is better. Maybe 99% in your area.

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#1540362 - 07/22/09 11:57 AM Re: Manual states 5w20 or 10w30? [Re: mechtech2]
Jaymus Offline


Registered: 05/11/07
Posts: 1245
Loc: Tennessee
0W-30 is a fine choice, perfectly safe.

3+ UOA's in a row with the same oil every time would be the only way to compare the two weights.
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#1540377 - 07/22/09 12:17 PM Re: Manual states 5w20 or 10w30? [Re: mechtech2]
Johnny248 Offline


Registered: 07/19/09
Posts: 1984
Loc: Detroit, MI
 Originally Posted By: mechtech2
jdblya - We can't determine an admission that 10-30 is better because of the manual's statements. That is a real stretch.

It appears that for 98% of driving, the 5-20 is better. Maybe 99% in your area.


For whatever reason, I just feel more comfortable with the Amsoil 0w30 oil over the 5w20. It may be that when I look at the specs, it offers better protection, or it just be that 30w is stuck in everyones head (or at least mine, growing up everything was 30w). All I know is that I drive the car only in the summer, and drive it pretty hard and it just gives me piece of mind.
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#1540661 - 07/22/09 05:16 PM Re: Manual states 5w20 or 10w30? [Re: mechtech2]
Johnny248 Offline


Registered: 07/19/09
Posts: 1984
Loc: Detroit, MI
 Originally Posted By: mechtech2
jdblya - We can't determine an admission that 10-30 is better because of the manual's statements. That is a real stretch.

It appears that for 98% of driving, the 5-20 is better. Maybe 99% in your area.


Also, it says "for optimal fuel economy and cold starting". 1% 2% Better fuel economy would be extremely optimistic. Not to mention, that there is prob less dray with a high quality 0w30 than there is in a conventional 5w20. Plus, I'm still pretty sure that 0w flows better on cold starting than does 5w
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#1540666 - 07/22/09 05:19 PM Re: Manual states 5w20 or 10w30? [Re: tig1]
MarkC Offline


Registered: 07/10/03
Posts: 9461
Loc: Not Seattle, but close.
 Originally Posted By: tig1
 Originally Posted By: MarkC
Someone who knows about such things begs to differ, and believes that a good 5W20 provides much better wear protection than a 5W30....


Not to insult you in any way but how do you know that?


Got it from a well-respected person who knows what he's talking about, based on things other than opinions or guesses.
Not to sound like a [censored], but that's all I can say.
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#1540684 - 07/22/09 05:31 PM Re: Manual states 5w20 or 10w30? [Re: MarkC]
JeepRubicon2k3 Offline


Registered: 06/17/09
Posts: 61
Loc: CONUS
0w's are ideal because they run the closest to operating temp when cooled. 90% of engine wear happens at start-up. Auto mans would run it but its only made in the syn flavor. $$$
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#1540689 - 07/22/09 05:34 PM Re: Manual states 5w20 or 10w30? [Re: sayjac]
Propflux01 Offline


Registered: 09/26/02
Posts: 3208
Loc: Arkansastan
 Originally Posted By: sayjac
Good to know there's so many posters, some new and psychic, who know more than the car manfacturers.


If they knew so much, then perhaps there wouldn't be recall notices would there?
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#1540692 - 07/22/09 05:38 PM Re: Manual states 5w20 or 10w30? [Re: MarkC]
Propflux01 Offline


Registered: 09/26/02
Posts: 3208
Loc: Arkansastan
 Originally Posted By: MarkC
Got it from a well-respected person who knows what he's talking about, based on things other than opinions or guesses.
Not to sound like a [censored], but that's all I can say.


No insult intended either, but since you provide no proof or statistics (I.E. Name or "things based on"), it would seem your posting is as heresay as the rest of the opinions. please show us...
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#1540728 - 07/22/09 06:06 PM Re: Manual states 5w20 or 10w30? [Re: MarkC]
HTSS_TR Offline


Registered: 04/17/06
Posts: 14986
Loc: Lake Forest, CA
 Originally Posted By: MarkC

Got it from a well-respected person who knows what he's talking about, based on things other than opinions or guesses.
Not to sound like a [censored], but that's all I can say.


My guess is the person mentioned here is T. D.
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#1540755 - 07/22/09 06:21 PM Re: Manual states 5w20 or 10w30? [Re: HTSS_TR]
OVERKILL Online   content


Registered: 04/28/08
Posts: 28948
Loc: Ontario, Canada
 Originally Posted By: HTSS_TR
 Originally Posted By: MarkC

Got it from a well-respected person who knows what he's talking about, based on things other than opinions or guesses.
Not to sound like a [censored], but that's all I can say.


My guess is the person mentioned here is T. D.


My oil choice is based on recommendations by D. H.
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#1540932 - 07/22/09 08:49 PM Re: Manual states 5w20 or 10w30? [Re: OVERKILL]
Gary Allan Offline


Registered: 09/28/02
Posts: 39806
Loc: Pottstown, PA
That's just a commonwealth loyalty thing


With the utmost respect for our accomplished and heralded member from Down Under, he lives in 40+ land. The mundanes really never interested him.
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#1540937 - 07/22/09 08:51 PM Re: Manual states 5w20 or 10w30? [Re: Gary Allan]
OVERKILL Online   content


Registered: 04/28/08
Posts: 28948
Loc: Ontario, Canada
 Originally Posted By: Gary Allan
That's just a commonwealth loyalty thing


With the utmost respect for our accomplished and heralded member from Down Under, he lives in 40+ land. The mundanes really never interested him.


We all bow to the Queen Guvnah!!!


Edited by OVERK1LL (07/22/09 08:52 PM)
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