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#4805250 - 07/04/18 06:30 PM Is higher weight oil in this heat a good idea?
CaptainFreon Offline


Registered: 08/05/15
Posts: 27
Loc: Indiana
Ford E350. 5.4L. 191K. No leaks and not burning, none added between changes.
This is a service work van. The cap says 5W-20W. Today I put in 10W-30W Mobil 1 synthetic high mileage.
It's real hot here. It can get very cold in the winter, was using 5-20 then.
What do you think?

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#4805255 - 07/04/18 06:39 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
JeepWJ19 Offline


Registered: 09/09/15
Posts: 940
Loc: PENNSYLVANIA
2v or 3v? I have a 2v but I thought I read somewhere 3v are picky? Not sure if that's true. I'd think you're fine in this heat, but not sure about winter. I'd think you'd be better off with M1 HM 5w30 if you wanted to stick with the 30 weight.
_________________________
2002 Jeep WJ 4.0 | Mobil 1 HM 5w30 |
TG8A | 2.5" lift | 148k miles

Software Engineer :]

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#4805263 - 07/04/18 06:57 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
JLTD Offline


Registered: 12/15/17
Posts: 831
Loc: US
For summer, my opinion is that the 10w30 is totally fine. Agree with JeepWJ19 that 5w30 in winter is a better choice.

IMO that engine should have a minimum 30 grade, especially in a heavy work environment. I recall the Schaeffer Oil Million Mile Van, they used 15w40 for its entire life.
_________________________
Hers: 2008 Jeep Liberty 135k, AMSOIL® SS 5w30/same

His: 2015 4Runner SR5 1GR-FE 39k, AMSOIL® OE 5w20/Wix

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#4805272 - 07/04/18 07:13 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
Trav Offline


Registered: 11/20/06
Posts: 19284
Loc: MA, Mittelfranken.de
Your totally fine running 10w30 in hot weather in that engine, agree 5w30 maybe a better choice for winter depending on how cold it gets.
No it does not cause cam phaser issues.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

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#4805273 - 07/04/18 07:20 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
PimTac Offline


Registered: 03/04/17
Posts: 4584
Loc: Soviet State of Washington
I’ve run vehicles below zero and above 100 degrees and I have never changed the grade of oil that was specified for the engine. Granted, during really cold weather the engine will take a bit longer to get up to temperature. If your cooling system is up to par then your engine should be fine.

If you are hauling or towing then that’s a separate issue and oil grade should be considered.
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4805278 - 07/04/18 07:29 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
Rat407 Offline


Registered: 12/13/02
Posts: 1492
Loc: North Carolina
I say follow the owners manual. Other wise why do they even bother to print it if nobody will follow it.
_________________________
2002 Silverado 5.3 0w-20 AMSOIL®

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#4805280 - 07/04/18 07:31 PM Re: Is higher weight oil in this heat a good idea? [Re: Rat407]
JLTD Offline


Registered: 12/15/17
Posts: 831
Loc: US
Originally Posted By: Rat407
I say follow the owners manual. Other wise why do they even bother to print it if nobody will follow it.


Please see the numerous threads on CAFE, mpg, and US oil specifications for your answer.
_________________________
Hers: 2008 Jeep Liberty 135k, AMSOIL® SS 5w30/same

His: 2015 4Runner SR5 1GR-FE 39k, AMSOIL® OE 5w20/Wix

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#4805285 - 07/04/18 07:43 PM Re: Is higher weight oil in this heat a good idea? [Re: JLTD]
Rat407 Offline


Registered: 12/13/02
Posts: 1492
Loc: North Carolina
Originally Posted By: JLTD
Originally Posted By: Rat407
I say follow the owners manual. Other wise why do they even bother to print it if nobody will follow it.


Please see the numerous threads on CAFE, mpg, and US oil specifications for your answer.


So the manual should read if you want to meet CAFE requirements and get better MPG then use the recommended 5w-20, otherwise run what you feel is best for your vehicle in your environment that makes you fee warm and fluffy inside.

That should about cover it.

All the vehicles running around in Phoenix AZ with 0w-20 in their sump are going to wear out quickly due to the extreme heat there. Maybe bithog should start a campaign there since it is so hot, to push 20w-50 so those individuals vehicles will last longer.
_________________________
2002 Silverado 5.3 0w-20 AMSOIL®

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#4805290 - 07/04/18 07:48 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
dave1251 Offline


Registered: 07/15/05
Posts: 8698
Loc: Maricopa, AZ
It really does not matter but are rather thin. It won't effect wear to the left or right.
_________________________
make the inside of your engine oil cap white.
don't use.

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#4805293 - 07/04/18 07:53 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
Bud Offline


Registered: 06/04/02
Posts: 1755
Loc: Texas
My last F150 was a 05 with the 5.4. Over the eleven years I kept it I used both 5w20 and 5w30. Saw no difference in how the truck ran or in gas mileage.
_________________________
2016 Honda Pilot EX-L with NAV.....Mobil 1 0w20 AFE and Ultra XG7317

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#4805300 - 07/04/18 08:09 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
wemay Online   happy


Registered: 04/04/12
Posts: 8986
Loc: Southeast Florida
I use both 20 and 30 in my Sonata here in steamy hot Miami. Meh, no difference.
_________________________
17 Sonata Sport 2.4L
NAPA Full Synthetic 5w20 | OEM

13 Santa Fe Sport 2.0T
Valvoline MaxLife 5w30 | M1-104

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#4805307 - 07/04/18 08:22 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
Cujet Offline


Registered: 02/15/03
Posts: 7217
Loc: Jupiter, Florida
My 5.4L prefers 10W-30 here in South FL. Better UOA's but also eliminates the mild phaser clatter.
_________________________

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#4805311 - 07/04/18 08:31 PM Re: Is higher weight oil in this heat a good idea? [Re: CaptainFreon]
Tahoe4Life Online   content


Registered: 04/26/08
Posts: 452
Loc: Miami Beach
I use only 20 in Miami. I ran 300K miles using 5w20 in a 2005 Crown Vic. That is in 24/7 nightmare traffic in Miami Beach with a/c constantly on. I only run 0w20 in my Tahoe. I do not see vehicles dropping dead on the side of the road using 20. Here in Miami it is hot all year long.

I wish this nonsense would stop about going to a higher oil grade oil [thinking it is better for your engine] because of summer heat.
_________________________
2016 Chevrolet Tahoe LT
Mobil 1 0w20 AFE or EP
AC Delco Filters

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#4805320 - 07/04/18 08:47 PM Re: Is higher weight oil in this heat a good idea? [Re: Rat407]
JLTD Offline


Registered: 12/15/17
Posts: 831
Loc: US
Originally Posted By: Rat407
Originally Posted By: JLTD
Originally Posted By: Rat407
I say follow the owners manual. Other wise why do they even bother to print it if nobody will follow it.


Please see the numerous threads on CAFE, mpg, and US oil specifications for your answer.


So the manual should read if you want to meet CAFE requirements and get better MPG then use the recommended 5w-20, otherwise run what you feel is best for your vehicle in your environment that makes you fee warm and fluffy inside.

That should about cover it.

All the vehicles running around in Phoenix AZ with 0w-20 in their sump are going to wear out quickly due to the extreme heat there. Maybe bithog should start a campaign there since it is so hot, to push 20w-50 so those individuals vehicles will last longer.


Ouch I just hurt my ocular nerve from rolling my eyes so far back. Not what I am saying at all, just trying to avoid putting the same information and debate from those threads here. Sorry that my post caused such a knee-jerk reaction; I cannot cure your lack of perspective, only you can do that so please go and actually do some reading.
_________________________
Hers: 2008 Jeep Liberty 135k, AMSOIL® SS 5w30/same

His: 2015 4Runner SR5 1GR-FE 39k, AMSOIL® OE 5w20/Wix

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#4805322 - 07/04/18 08:54 PM Re: Is higher weight oil in this heat a good idea? [Re: JLTD]
4WD Offline


Registered: 09/21/10
Posts: 6527
Loc: Texas
Originally Posted By: JLTD
Originally Posted By: Rat407
I say follow the owners manual. Other wise why do they even bother to print it if nobody will follow it.


Please see the numerous threads on CAFE, mpg, and US oil specifications for your answer.


With that mileage - a 30 grade is not exactly some radical decision …

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