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#4638718 - 01/18/18 11:46 AM 5w-40 vs 10w-40
Zukinut Offline


Registered: 10/03/14
Posts: 55
Loc: East tn
In my 95 landcruiser I run 10w-40. For many reasons. With that said, 10w-40 is getting hard to find in stock in my area.

Would running 5w-40 negatively affect anything? I can't see how it could, but my brain is jello due to this cold I've got and I figured I should ask folks who are more knowledgeable than me.

Thanks in advance,

Will.

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#4638731 - 01/18/18 12:10 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7479
Loc: S California
If there was any change no matter how insignificant I would say it would be a change for the better. You will at least do absolutely no harm. Startup lubrication would improve but the difference would be slight. So, change to the new viscosity and think of it as an upgrade.

My comments are slightly prejudiced. He's my thinking about my choice of oil for my DD's. 10w-30 is better than 30W. 5w-30 is better than 10w-30 and 0w-30 is better yet. So I run 0w-30 in my 3 daily drivers.

Can you get Mobil 1 or some synthetic like it on sale? Maybe consider 0w-40. Just a thought especially if your vehicle is a keeper and it gets cold where you drive or you're a short tripper. Oil today is very good at handling a larger spread in viscosity ratings.

A neighbor is running a 5w-50 oil in a father/son project car. They used to run the father's choice, 20w-50 but with exposure to BITOG on the part of the father by the son they "upgraded" to the 5w-50 and have experienced no problems. This car gets driven on the street and taken to the drag strip for bracket racing.

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#4638734 - 01/18/18 12:11 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
cb4017 Offline


Registered: 08/11/05
Posts: 150
Loc: Northern Nevada
You should have no problems. I use Rotella 5w-40 in a 90s vintage roller block 302 in my 62 Falcon. Mu daughter's Rodeo uses oil. In that I use WalMart Super Tech HM 10w-40 which seems to be readily available.
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#4638816 - 01/18/18 01:14 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 18173
Loc: Dallas,Tx USA
I guess maybe it's a location thing? Every Walmart I've been into carries every major brand in 10W40.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum 0W20



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#4638823 - 01/18/18 01:19 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: Zukinut
10w-40 is getting hard to find in stock in my area.


Autozone just had all their 10W-40 on clearance for $2 a quart in December.
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4638825 - 01/18/18 01:20 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
There's also 15W-40 HDEO for summer months.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4638842 - 01/18/18 01:37 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1751
Loc: Alberta
Originally Posted By: Zukinut
In my 95 landcruiser I run 10w-40. For many reasons. With that said, 10w-40 is getting hard to find in stock in my area.

Would running 5w-40 negatively affect anything? I can't see how it could, but my brain is jello due to this cold I've got and I figured I should ask folks who are more knowledgeable than me.

Thanks in advance,

Will.


I could not bring up a owners manual from 1995 but I was able to for 2000. 5W-30 was the preferred oil. Going to 5 on the lower end should not be a problem. It's what Toyota wanted you to do in the first place.

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#4638846 - 01/18/18 01:47 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
Ramblejam Offline


Registered: 11/05/13
Posts: 3210
Loc: Kentucky
1995 Land Cruiser is 80 series - 4.5L I6 (1FZ-FE)
2000 Land Cruiser is 100 series - 4.7L V8 (2UZ-FE)

Completely different.

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#4638862 - 01/18/18 02:01 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
Zukinut Offline


Registered: 10/03/14
Posts: 55
Loc: East tn
Thanks fellas, the info is really appreciated.

Will

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#4638864 - 01/18/18 02:02 PM Re: 5w-40 vs 10w-40 [Re: OneEyeJack]
sohccammer427 Offline


Registered: 12/11/06
Posts: 51
Loc: North Carolina, USA
Originally Posted By: OneEyeJack

...my thinking about my choice of oil for my DD's. 10w-30 is better than 30W. 5w-30 is better than 10w-30 and 0w-30 is better yet. So I run 0w-30 in my 3 daily drivers...


But isn't having move viscosity improves not always such a good thing? In a controlled environment of say 90 degrees F would a straight 30w be better that a 0w30?
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#4638889 - 01/18/18 02:33 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
KMJ1992 Offline


Registered: 01/01/18
Posts: 95
Loc: Iowa, United States
Typically the lower the first number the better. However, if you are in a warm climate, the higher first number oils will shear less over time. Probably irrelevant if your engine is in good shape, but worth noting. That said, a 5w40 syn will shear less than a 10w40 conventional in most cases. In my case, i found that 0w40 is unnessesary for my climate. Even at -10F my Benz has no issues starting with 5w40 synpower. And we might see that temp twice a year. The 5w40 seems a bit quieter than the 0w40 M1 the previous owner used. But that was used oil and a different brand, so not exactly a fair comparison.
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#4638964 - 01/18/18 04:04 PM Re: 5w-40 vs 10w-40 [Re: KMJ1992]
Ducked Offline


Registered: 10/25/12
Posts: 4376
Loc: Taiwan
Originally Posted By: KMJ1992
Typically the lower the first number the better.


Or the other way around.

Depending on who you ask.

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#4638995 - 01/18/18 04:35 PM Re: 5w-40 vs 10w-40 [Re: Linctex]
car51 Online   content


Registered: 03/12/15
Posts: 10257
Loc: Southwest PA
Originally Posted By: Linctex
Originally Posted By: Zukinut
10w-40 is getting hard to find in stock in my area.


Autozone just had all their 10W-40 on clearance for $2 a quart in December.
Originally Posted By: Linctex
Originally Posted By: Zukinut
10w-40 is getting hard to find in stock in my area.


Autozone just had all their 10W-40 on clearance for $2 a quart in December.



Exactly!
_________________________
2009 Toyota Camry LE

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#4639243 - 01/18/18 08:15 PM Re: 5w-40 vs 10w-40 [Re: Zukinut]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 18173
Loc: Dallas,Tx USA
Your spec'd viscosity and capacity is:

VISCOSITIES:
Below 50 F .5W-30
Above 0 F .10W-30
CAPACITIES: With filter 7.8 quarts After refill check oil level.
TORQUES: Oil Drain Plug...18 ft/lbs
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum 0W20



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#4639505 - 01/19/18 02:14 AM Re: 5w-40 vs 10w-40 [Re: Zukinut]
jj51702 Offline


Registered: 10/07/16
Posts: 232
Loc: California
I see supertech 10-40 all the time at walmart. Or if u order enough thru their website get free shipping of whatever 10-40 u want

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