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5w-40 vs 10w-40 #4638718
01/18/18 12:46 PM
01/18/18 12:46 PM
Joined: Oct 2014
Posts: 55
East tn
Zukinut Offline OP
Zukinut  Offline OP
Joined: Oct 2014
Posts: 55
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.

Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638731
01/18/18 01:10 PM
01/18/18 01:10 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
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.

Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638734
01/18/18 01:11 PM
01/18/18 01:11 PM
Joined: Aug 2005
Posts: 152
Northern Nevada
cb4017 Offline
cb4017  Offline
Joined: Aug 2005
Posts: 152
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.


Cliff
USN Ret., FPD Ret.
Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638816
01/18/18 02:14 PM
01/18/18 02:14 PM
Joined: Dec 2006
Posts: 18,620
Dallas,Tx USA
aquariuscsm Offline
aquariuscsm  Offline
Joined: Dec 2006
Posts: 18,620
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
Quaker State Ultimate Durability 5W20

Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638823
01/18/18 02:19 PM
01/18/18 02:19 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
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.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638825
01/18/18 02:20 PM
01/18/18 02:20 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
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."
Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638842
01/18/18 02:37 PM
01/18/18 02:37 PM
Joined: Dec 2017
Posts: 2,314
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,314
SE British Columbia, Canada
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.


If you want the job done right......do it yourself.
Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638846
01/18/18 02:47 PM
01/18/18 02:47 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
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.

Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638862
01/18/18 03:01 PM
01/18/18 03:01 PM
Joined: Oct 2014
Posts: 55
East tn
Zukinut Offline OP
Zukinut  Offline OP
Joined: Oct 2014
Posts: 55
East tn
Thanks fellas, the info is really appreciated.

Will

Re: 5w-40 vs 10w-40 [Re: OneEyeJack] #4638864
01/18/18 03:02 PM
01/18/18 03:02 PM
Joined: Dec 2006
Posts: 52
North Carolina, USA
sohccammer427 Offline
sohccammer427  Offline
Joined: Dec 2006
Posts: 52
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?


2015 VW Passat TDi 6 Speed Manual
2017 Colorado Duramax
Re: 5w-40 vs 10w-40 [Re: Zukinut] #4638889
01/18/18 03:33 PM
01/18/18 03:33 PM
Joined: Jan 2018
Posts: 101
Iowa, United States
KMJ1992 Offline
KMJ1992  Offline
Joined: Jan 2018
Posts: 101
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.


Valvoline- World's First, World's Finest!
Always Wix or Purolator, NEVER FRAM!!!
Re: 5w-40 vs 10w-40 [Re: KMJ1992] #4638964
01/18/18 05:04 PM
01/18/18 05:04 PM
Joined: Oct 2012
Posts: 4,602
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,602
Taiwan
Originally Posted By: KMJ1992
Typically the lower the first number the better.


Or the other way around.

Depending on who you ask.

Re: 5w-40 vs 10w-40 [Re: Linctex] #4638995
01/18/18 05:35 PM
01/18/18 05:35 PM
Joined: Mar 2015
Posts: 10,792
In the shop
53' Stude Offline
53' Stude  Offline
Joined: Mar 2015
Posts: 10,792
In the shop
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!


09' Camry LE, 141,020 miles

PP 5w30 and TG 4967
Re: 5w-40 vs 10w-40 [Re: Zukinut] #4639243
01/18/18 09:15 PM
01/18/18 09:15 PM
Joined: Dec 2006
Posts: 18,620
Dallas,Tx USA
aquariuscsm Offline
aquariuscsm  Offline
Joined: Dec 2006
Posts: 18,620
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
Quaker State Ultimate Durability 5W20

Re: 5w-40 vs 10w-40 [Re: Zukinut] #4639505
01/19/18 03:14 AM
01/19/18 03:14 AM
Joined: Oct 2016
Posts: 232
California
jj51702 Offline
jj51702  Offline
Joined: Oct 2016
Posts: 232
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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