Recent Topics
PureOne PL14459 cut-open
by filb14
12/22/14 03:30 PM
Edge Gold Btl + M1 AFE 0w-30 $1 Qt at AZ **PICS!**
by Turk
12/22/14 03:07 PM
Bon Jovi is as good as Beyoncé
by 285south
12/22/14 02:52 PM
Robots are lookin good!
by andrewg
12/22/14 02:47 PM
North Korea Internet down...
by andrewg
12/22/14 02:42 PM
Another one gone
by Inspecktor
12/22/14 02:17 PM
2015 Impala vs...
by oilpsi2high
12/22/14 01:04 PM
Magnatec Spotted at AAP
by BTLew81
12/22/14 01:00 PM
Automatic Car Wash/DIY
by lawman1909
12/22/14 12:17 PM
Coolant refill
by supton
12/22/14 12:12 PM
Music is horrible today...
by MalfunctionProne
12/22/14 12:07 PM
180k mile Clean engine pictures
by donnyj08
12/22/14 11:45 AM
Newest Members
Kaiser_Sosse, jnormando, consolidated, mike_a, dlayman
52261 Registered Users
Who's Online
124 registered (aa1986, badtlc, 285south, AccordV6MN, 01rangerxl, 2010_FX4, 9 invisible), 1633 Guests and 216 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
52261 Members
66 Forums
223802 Topics
3549798 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Page 1 of 4 1 2 3 4 >
Topic Options
#3105308 - 08/25/13 03:24 PM 10w30 vs 5w30
larryn Offline


Registered: 08/19/10
Posts: 32
Loc: mn
10w30 vs 5w30 when towing in hot weather 95/100F , oil will be changed after 5000 to 6000 mile 6 week trip.oil is quaker state UD.truck is an 09, 6L 1500 silverado.trailer is approx. 6800#.

Top
#3105311 - 08/25/13 03:34 PM Re: 10w30 vs 5w30 [Re: larryn]
Realtech214 Offline


Registered: 02/01/13
Posts: 635
Loc: Florida
5w30 & 10w30 are the same approved
_________________________
2003 Suburban PYB
2001 Suburban PYB
- - - - - - - - -- - - - - - - -- - - - - - -- - -
I like oil too much & ALWAYS PYB

Top
#3105335 - 08/25/13 04:12 PM Re: 10w30 vs 5w30 [Re: larryn]
dparm Online   content


Registered: 04/19/10
Posts: 12588
Loc: Chicago, IL
No real reason not to use a 5w30 -- modern formulations are very stout.
_________________________
2011.5 BMW M3 saloon ZCP
der stärkste buchstabe der welt
Castrol Edge Professional TWS 10w60 + Mahle OX 254D3

Top
#3105369 - 08/25/13 04:50 PM Re: 10w30 vs 5w30 [Re: larryn]
gfh77665 Offline


Registered: 09/01/08
Posts: 2419
Loc: Southeast Texas
Both great oils, but the 10-30 is a slightly better fit for this application. There will be no benefit with the "5" in hot summer towing. 10-30 is slightly better here.

Top
#3105380 - 08/25/13 05:06 PM Re: 10w30 vs 5w30 [Re: larryn]
Eddie Offline


Registered: 12/07/03
Posts: 6852
Loc: Florida, Cape Coral
Most #10s have a lower NOACK value, which I like with a DI engine.
_________________________
CX5 Touring 2.5L :-)

Top
#3105386 - 08/25/13 05:13 PM Re: 10w30 vs 5w30 [Re: larryn]
JOD Offline


Registered: 09/10/09
Posts: 3145
Loc: PNW/WA
I doubt anyone can give you an answer that amounts to anything more than speculation, since there's really no information available regarding the specs of QSUD 10W30. OTOH, there is some information on the 5W30, both Amsoil's tests and PQIA test on 5W30 synthetics: link

The QSUD looked really good in that test, so I'd go with it since it's a known quantity. Lots of the speculation you hear about higher HTHS and lower NOACK in the 10W30 versions of oil often doesn't actually hold true when you look at the specs. Often times, it's just a more cheaply-made product.

Top
#3105388 - 08/25/13 05:15 PM Re: 10w30 vs 5w30 [Re: gfh77665]
chubbs1 Offline


Registered: 06/09/10
Posts: 4574
Loc: Merritt Island FL, USA
Originally Posted By: gfh77665
Both great oils, but the 10-30 is a slightly better fit for this application. There will be no benefit with the "5" in hot summer towing. 10-30 is slightly better here.


I disagree with this blanket statement but QSUD 5w30 (as most SOPUS "syns" are thin 30grade). You may benefit from the slightly thicker 10w30QSUD.

Personally I would use a thicker 5w30 like M1 or Syntec(Edge). You will have a higher VI and the same if not lower NOACK. 10w30 "syn" is obsolete and pointless IMO. If I was that worried I would just use HDEO 10w30.
_________________________
'12 Charger SXT
QSUD 5w30 OEM filter

'12 Charger SXT
Edge FST EP 5w30 OEM (Mine;)

'11 Hyundai Sonata GLS
QSUD 5w20 OEM Filter


Top
#3105420 - 08/25/13 06:10 PM Re: 10w30 vs 5w30 [Re: larryn]
mattwithcats Online   content


Registered: 06/13/13
Posts: 763
Loc: Virginia
First number is lubricity (how well an oil flows) when cold. Second number is lubricity when hot.

So the only difference between a 10W-30 and 5W-30 is at startup, and in cold weather...

Both are 30 weight oils when hot...

Top
#3105461 - 08/25/13 07:03 PM Re: 10w30 vs 5w30 [Re: larryn]
gfh77665 Offline


Registered: 09/01/08
Posts: 2419
Loc: Southeast Texas
10-30 typically is a bit thicker at high temps, and is a bit more shear stable. Again, the "5" won't benefit any in this application.

Top
#3105663 - 08/25/13 10:44 PM Re: 10w30 vs 5w30 [Re: mattwithcats]
y_p_w Offline


Registered: 05/06/05
Posts: 2589
Loc: SF Bay Area
Originally Posted By: mattwithcats
First number is lubricity (how well an oil flows) when cold. Second number is lubricity when hot.

So the only difference between a 10W-30 and 5W-30 is at startup, and in cold weather...

Both are 30 weight oils when hot...

It's far more complicated than that. It's my understanding that a 5W-30 RC motor oil would likely provide better highway fuel economy than 10W-30.

The first number has mostly to do with cold weather flow, and the standard is actually at different temps. The second number has to do with viscosity at 100 °C. What the viscosity is at any given temperate starting temperature varies greatly by the oil. Apparently some 0W-30 oils are thicker at 25 °C than most 5W-30/10W-30 oils.

http://www.widman.biz/English/Tables/J300.html

It should be possible to formulate a 5W-30 that's thicker than another 10W-30 at a typical warm-weather temperature. That's not typical, but possible.

Top
#3105745 - 08/26/13 12:49 AM Re: 10w30 vs 5w30 [Re: y_p_w]
BlueOvalFitter Offline


Registered: 02/28/03
Posts: 3574
Loc: Cajun Country, La.
popcorn
_________________________
2007 F150 XL, 4.2 V6
"One Filter, One OCI!"
Pennzoil HM 5W30, MC FL-400S

Top
#3105747 - 08/26/13 12:58 AM Re: 10w30 vs 5w30 [Re: y_p_w]
Garak Offline


Registered: 12/05/09
Posts: 11782
Loc: Regina, Saskatchewan, Canada
Originally Posted By: y_p_w
It should be possible to formulate a 5W-30 that's thicker than another 10W-30 at a typical warm-weather temperature. That's not typical, but possible.

That's absolutely true, and even 0w-30s can be thicker.

@larryn: If you're out of warranty or don't care or it's allowed in the manual, go ahead and use 10w-30. Personally, I'd use the 5w-30 in it year round, towing or not.
_________________________
Plain, simple Garak.

2008 Infiniti G37 coupe - Mobil Delvac 1 ESP 5w-40, Hastings LF113
1984 F-150 4.9L six - Quaker State GB 10w-30, Wix 51515

Top
#3106022 - 08/26/13 10:14 AM Re: 10w30 vs 5w30 [Re: larryn]
KCJeep Offline


Registered: 06/30/11
Posts: 4760
Loc: Mahzurrah!
Out of vogue here no doubt but 10w30 is still useful and will usually work very well in about anything you care to use it in. Heavy towing, summer, exactly a situation where 10w30 would be useful or even a better choice.
_________________________
2004 Jeep GC WJ 4.0 @ 123k Pennzoil YB 5w30 - MoS2
Napa Silver 31516
KIA Sedona 41k, Chevy Lumina 174k, Chrysler Sebring 174k, Chrysler Concorde 99k

Top
#3106058 - 08/26/13 10:58 AM Re: 10w30 vs 5w30 [Re: KCJeep]
y_p_w Offline


Registered: 05/06/05
Posts: 2589
Loc: SF Bay Area
Originally Posted By: KCJeep
Out of vogue here no doubt but 10w30 is still useful and will usually work very well in about anything you care to use it in. Heavy towing, summer, exactly a situation where 10w30 would be useful or even a better choice.

Years ago I was looking to get a new car and found myself in an Acura dealer. I asked if I could look under the engine bay of an NSX and then popped it and tried to figure out how to get it up. One up, there was the typical info for recommended oils, spark plugs, etc on the air filter housing. I was a bit surprised that the recommended oil was a 10W-30 when 5W-30 was pretty standard by that time.

However, what's really out of vogue these days is 30 wt oil except maybe for lawn mowers. I remember hearing someone comment that for ideal protection (but not necessarily fuel economy), 30 wt could probably work better if there weren't concerns about cold starts. If it's summer temps, it should flow pretty quickly, and if you could ensure that it only gets warm starts or that a block heater is used long enough before starting, it would be ideal.

Top
#3106074 - 08/26/13 11:19 AM Re: 10w30 vs 5w30 [Re: BlueOvalFitter]
lexus114 Offline


Registered: 05/12/08
Posts: 6026
Loc: Easton, PA
Originally Posted By: BlueOvalFitter
popcorn



Yeah I know right? ^^
_________________________
2012 Mercedes-Benz C300 4matic
2015 Lexus RX350 AWD

Top
Page 1 of 4 1 2 3 4 >