Recent Topics
VW Jetta MK4 AC problems
by gregoron
48 minutes 36 seconds ago
Benefit in cleaning intake manifold?
by Spetz
Today at 04:07 AM
Impressed by how quickly condensation takes over
by DoubleWasp
Today at 01:45 AM
ghetto bird circling
by Chris142
Today at 01:20 AM
Injector spray pattern has gotten pathetic
by DoubleWasp
Today at 12:54 AM
Oil change scam
by Darwin1138
Today at 12:14 AM
does exide stil make the orbital?
by Chris142
Yesterday at 11:35 PM
Black Hole in Dwarf Galaxy M60-UCD1
by Apollo14
Yesterday at 11:32 PM
microguard new style, 3k- 6 month oil change ?
by MetalSlug
Yesterday at 11:11 PM
Renting house out with marketplace homes?
by jay929
Yesterday at 10:43 PM
Lower MPG after synthetic switch
by BrandonVA
Yesterday at 10:41 PM
drive once in a few month oil change question .
by MetalSlug
Yesterday at 10:38 PM
Newest Members
MikeF, jim1224, Wompem, Dlauth, ToddT58
51371 Registered Users
Who's Online
29 registered (asiancivicmaniac, Char Baby, 97f150, Azeem, eljefino, 3 invisible), 627 Guests and 193 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51371 Members
64 Forums
219616 Topics
3466193 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Page 3 of 3 < 1 2 3
Topic Options
#3403052 - 06/21/14 02:00 PM Re: is 0W-20 always better for mpg than 5W-20? [Re: yvon_la]
OVERKILL Offline


Registered: 04/28/08
Posts: 26160
Loc: Ontario, Canada
Originally Posted By: yvon_la
Could any explain to me why the majority of car maker say to use
5wxx ?how come almost all car maker never say 0wxx .what is wron with a 0wxx oil?is it an issue in the dino version?


Because it requires a synthetic and is more expensive. OEM's that generally aren't German usually don't make it a policy to spec (expensive) synthetic oil.
_________________________
Network Engineer
02 Expedition
01 BMW ///M5
06 Charger R/T

Top
#3403068 - 06/21/14 02:31 PM Re: is 0W-20 always better for mpg than 5W-20? [Re: virginoil]
CATERHAM Offline


Registered: 11/18/05
Posts: 9469
Loc: Burlington, Ontario, Canada
Originally Posted By: virginoil
Originally Posted By: CATERHAM
Jasper8146, as others have mentioned, your car is spec'd for the 5W-20 grade so in a warranty situation it is possible that you could be questioned as to why you're using a 0W-20.
Now if you're not concerned with that then yes you can use a 0W-20 and even the TGMO 0W-20 as a number of Hyundai/kia owners have with good UOA results. But be advised that TGMO is one of lightest 20 grade oils available so in your climate, since your car is not equipped with oil gauges to monitor things I'd suggest substituting a 1/2-1 quart of M1 0W-40 to give your a somewhat heavier 0W-20 oil. It will still be lighter on start-up than all 5W-20s and even most aftermarket 0W-20s, but it will retain a higher high temp' viscosity.


Why not promote the OP to find a ?w-20 oil with the appropriate builder approval. The OEM would quiver how freely it it is touted mix this with that to come up with what ?

Surely with the huge range oil of brands for selection in that grade you have in the USA, compared to OZ, there must be one on the shelf you can add with confidence in an unadulterated form straight out of the container.

Unbelievable from my view point in OZ.

Yes virtually every oil brand offers something in a 5W-20 and now the 0W-20 grade in NA but as I mentioned Hyundai/Kia don't spec' the 0W-20 grade just 5W-20.
The OP could use M1 0W-20 which Mobil states will not void any companies warranty when used when 5W-20 is specified but that's about it.
The OP inquired about using TGMO 0W-20 and is the reason for my response. If he was interested in something a bit heavier without blending, SynGard 0W-20 (220 VI, HTHSV 2.7cP) would be an option but it is not as readily available.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3403541 - 06/22/14 06:02 AM Re: is 0W-20 always better for mpg than 5W-20? [Re: Jasper8146]
virginoil Offline


Registered: 09/05/05
Posts: 1023
Loc: western australia

Caterham the vehicle in question is a 2014 under warranty it puzzles me why in this instance you promote a mix this and that to get who knows what.

If the OP is off the mark I would expect an experienced BITOGer to inform the OP to follow OEM directions.

This is my view, like you have yours, and the longer I spend on this forum I am seeing the OEMs perspective clearer and clearer.
_________________________
Hmmmmmmmmm now which tree/s in the Garden did He say I can eat from ?

Top
#3403608 - 06/22/14 08:22 AM Re: is 0W-20 always better for mpg than 5W-20? [Re: Jasper8146]
Cujet Offline


Registered: 02/15/03
Posts: 4130
Loc: Jupiter, Florida
I don't want to generalize with engines and climates I'm not familiar with.

However, here in hot and humid South Florida, thinner oils result in higher UOA wear metals, in my "fleet". Others have different results. I'm hard on things, it seems.
_________________________
Turbo's rule.

Top
#3404465 - 06/23/14 10:58 AM Re: is 0W-20 always better for mpg than 5W-20? [Re: Jasper8146]
jrustles Offline


Registered: 02/24/13
Posts: 1997
Loc: Ontario, Canada
So... is this a diesel engine we're all talkin about here?
_________________________
"No matter how paranoid or conspiracy-minded you are, what the government is actually doing is worse than you imagine" W.Blum

Top
#3423915 - 07/13/14 09:46 PM Re: is 0W-20 always better for mpg than 5W-20? [Re: Jasper8146]
Greasymechtech Offline


Registered: 07/11/14
Posts: 316
Loc: Paradise of Florida
Whether under warranty or not is irrelevant.
For the most MPG, use any full synthetic 0w20.
You probably wont see the mpg difference when compared to a full synth 5w20.
When the transmission is due for service, use a full synth fluid there too.
_________________________
At what point should a lurker start posting :-)

Top
Page 3 of 3 < 1 2 3