Recent Topics
Dex VI in older high mileage Chevy truck
by gfh77665
04/19/14 08:48 AM
Mobil1 0W40, 10000 OCI, Infiniti G37S VQ37VHR
by MiLKMD
04/19/14 08:39 AM
New to me John Deere 425
by KD0AXS
04/19/14 08:28 AM
Am I flushing $$
by Camprunner
04/19/14 08:20 AM
Brake Fluid Flush
by 01_celica_gt
04/19/14 05:38 AM
ultramatic grease
by rawd
04/19/14 05:12 AM
Another detail - Polish & Wax
by The Critic
04/19/14 03:44 AM
On AMSOIL for the first time
by alcyon
04/19/14 03:23 AM
Review: Microfiber Madness Incredisponge
by The Critic
04/19/14 02:50 AM
Ducked's Dirty Daihatsu
by Ducked
04/19/14 02:38 AM
Bell-ray 10w40 Full Syn
by sanoptic
04/19/14 02:26 AM
Why doesn't 10W-30 meet dexos1 ?
by Merkava_4
04/19/14 01:01 AM
Newest Members
BryanM, otbevo, AF_CyberDude, JDMHero47, Laethageal
49619 Registered Users
Who's Online
91 registered (2004tdigls, ajoter, andyd, 123Saab, 147_Grain, 8 invisible), 1910 Guests and 218 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
49619 Members
64 Forums
212097 Topics
3324447 Posts

Max Online: 2551 @ 04/05/14 01:28 PM
Donate to BITOG

Topic Options
#2965087 - 04/07/13 09:51 AM 5w20 & 5w30
termigator Offline


Registered: 03/29/11
Posts: 177
Loc: FL
Can you use 5w20 for a car that calls for 5w30? I have a 2008 Lexus IS350 that calls for 5w30 and I've been using Synpower 5w30 since new. I know there have been numerous discussions on the IS forums on whether you can use 5w20 or not because there was a supposed TSB for the 2006 model (same generations as the 2008) that told the dealers to switch to 5w20. I've already read the viewpoints from the car-obsessed guys (e.g. "better mileage with 5w20" or "stick with manufacturer recommended 5w30 or you'll be sorry"). I would also like to hear the opinions from the oil-obsessed folks too. smile

Top
#2965097 - 04/07/13 10:05 AM Re: 5w20 & 5w30 [Re: termigator]
gfh77665 Offline


Registered: 09/01/08
Posts: 2090
Loc: Southeast Texas
You are in Florida. What on earth are you trying to "gain" by using 5-20?

Top
#2965100 - 04/07/13 10:10 AM Re: 5w20 & 5w30 [Re: termigator]
147_Grain Online   content


Registered: 03/11/13
Posts: 1134
Loc: USA
I would only use the 5W-20 in the winter and stay with a 5W-30 the rest of the time.

While manufactures might be altering their recommendations on oil weights to me CAFE, their engines are largely still the same. Common sense tells you that hot climates like Florida call for a thicker 30-weight oil in the summer.

Personally, I use 0W-30 from Amsoil year around in all my vehicles and don't worry and protection in the cold or heat.
_________________________
2013 Subaru Outback Limited H6 AWD
2005 Kia Sorento EX 4x4
2005 Dodge Neon SXT

Top
#2965112 - 04/07/13 10:18 AM Re: 5w20 & 5w30 [Re: gfh77665]
termigator Offline


Registered: 03/29/11
Posts: 177
Loc: FL
Originally Posted By: gfh77665
You are in Florida. What on earth are you trying to "gain" by using 5-20?


Not trying to "gain" anything. I just happen to have more 5w20 (currently sitting on 210 qts) than 5w30 (104 qts) and I was wondering if the car would be harmed if I used 5w20.

Top
#2965114 - 04/07/13 10:20 AM Re: 5w20 & 5w30 [Re: termigator]
hemitom Offline


Registered: 03/12/07
Posts: 713
Loc: canada
Try mixing the two together
_________________________
2006 kia spectra
2006 chrysler 300

Top
#2965123 - 04/07/13 10:29 AM Re: 5w20 & 5w30 [Re: hemitom]
147_Grain Online   content


Registered: 03/11/13
Posts: 1134
Loc: USA
Originally Posted By: hemitom
Try mixing the two together


...........Mix in the winter and not the summer.
_________________________
2013 Subaru Outback Limited H6 AWD
2005 Kia Sorento EX 4x4
2005 Dodge Neon SXT

Top
#2965126 - 04/07/13 10:33 AM Re: 5w20 & 5w30 [Re: termigator]
gfh77665 Offline


Registered: 09/01/08
Posts: 2090
Loc: Southeast Texas
This^.

Top
#2965144 - 04/07/13 10:55 AM Re: 5w20 & 5w30 [Re: termigator]
fisher83 Offline


Registered: 01/26/12
Posts: 266
Loc: Omaha, NE USA
Probably won't help or hurt anything. Lots of dealers just dump a single viscosity oil in all the vehicles that is "close enough" to cut costs. If the newer ones are using 5w20, they are probably just using that in all the cars they are servicing.The Hyundai/Kia dealer that I used to get oil changes at always used Kendall synthetic blend 5w20 and Hyundai filter on my 2001 Accent which did not spec 5w20 and it did not cause any issues. I never even realized it until years later when I was going through the service records when I was selling it. I have used both 5w20 and 5w30 in both conventional and synthetic form in my Caravan and found no noticeable gas mileage difference. I wouldn't expect to see a difference by switching to 5w20. That being said, if the store were completely sold out of 5w30 (unlikely) I wouldn't drive across town in search of it, I'd just grab the 5w20 smile
_________________________
2004 Hyundai Elantra Valvoline Maxlife and OEM filter
2005 Dodge Caravan Valvoline Maxlife and Mopar filter

Top
#2965186 - 04/07/13 11:40 AM Re: 5w20 & 5w30 [Re: termigator]
Hyde244 Offline


Registered: 12/29/12
Posts: 606
Loc: Ohio
Can never go wrong with manufacturer recommendation. They built the engine and debated the exact same application for what weight oil to use.
_________________________
2007 Ford Focus ZX4 SES - 2.0L Duratec | 4F27E Auto | 80,000 miles
Edge w/ Ti 0w20 | MC 400 | Castrol Mercon V

Top
#2965222 - 04/07/13 12:32 PM Re: 5w20 & 5w30 [Re: termigator]
Rand Offline


Registered: 08/20/03
Posts: 6675
Loc: Akron,Ohio
you can usually go thicker but not thinner than recommended.

at least not without an oil temp/oil pressure gauge.


Edited by Rand (04/07/13 12:32 PM)
_________________________
2011 Subaru Forester X Prem. 5MT

Top
#2965226 - 04/07/13 12:36 PM Re: 5w20 & 5w30 [Re: termigator]
renegade_987 Offline


Registered: 04/07/11
Posts: 1447
Loc: Ankeny, IA
I see no problem if you wanted to go thicker, but the manufacturer didn't say you could go thinner for a reason, so I would stick with 5w30
_________________________
2004 F150 154K Formula Shell 5w20/Fram Tough Guard

2011 Baja MB200 Royal Purple 10w30




Top
#2965247 - 04/07/13 01:00 PM Re: 5w20 & 5w30 [Re: renegade_987]
LFN Offline


Registered: 10/24/12
Posts: 16
Loc: TX
My KIA dealer put in 5w-30. Another one uses 5w-20. Manual says both grades are fine for a 2006 Kia spectra. They both use Mobile clean/super 5000 conventional, forgot what it's called now.

One thing they both do is put a 3K oil change reminder sticker on, which gets thrown in the trash. I'll be [censored] if that oil is not good for at least 5K for that car.

Top
#2965356 - 04/07/13 02:56 PM Re: 5w20 & 5w30 [Re: termigator]
fdcg27 Offline


Registered: 09/25/09
Posts: 8068
Loc: OH
The difference in operating viscosity between a thin 5W-30 and a thick 5W-20 is pretty insignificant.
I'd doubt that a 5W-20 would hurt your engine in any way, but given where you live, I doubt that it would be of much help either, unless you rarely drive the car far enough to get the oil up to normal operating temperature.
I'd probably be happy just to use a 5W-30 in Florida all year.
If you lived up here, a 5W-20 might be better for winter use, but you don't.
You could probably use either oil with good results and no significant difference in wear in any climate, though.
The recommended oil grade for any engine seems more related to its expected use and maker's philosophy than it does to any real mechanical differences.
You could email Toyota and ask them whether a 5W-20 is okay in this engine.
They would know better than I or anyone else here.
_________________________
12 Accord LX 15K HGMO 0W-20
09 Forester 64K PU 5W-30
02 Accord 127K G-Oil 5W-30
01 Focus ZX3 94K GTX 5W-20
95 BMW 318iC 143K Maxlife 10W40

Top
#2965565 - 04/07/13 07:06 PM Re: 5w20 & 5w30 [Re: termigator]
tig1 Offline


Registered: 01/03/09
Posts: 9492
Loc: Illinois
M1 0-30 year round.
_________________________
2007 Ford Fusion 133,000 miles
M1 0-20
2007 Ford Focus 122,000 miles
M1 0-20
10,000 mile OCIs on both engines
M1 ATF
M1 10-30 in all OPE

Top