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Moving back to recommended oil #4751673
05/09/18 12:50 AM
05/09/18 12:50 AM
Joined: May 2018
Posts: 5
Gauteng, South Africa
NAPSTER Offline OP
NAPSTER  Offline OP
Joined: May 2018
Posts: 5
Gauteng, South Africa
Hi All.

I am in a unique position here.

My GF drives a 2004 Hyundai Getz 1.6. The oil that the OEM recommends to use is 10w40. She has, however, been driving the car with 20w50 for 1-2years now.

My Question is, should I go back to the recommended oil or should I keep using 20w50 now? I am just concerned that using 20w50 for such a long time may have changed the tollerances in the engine and if I now go back to 10w40 it will cause problems......?

Any help please as I am looking to do an oil service this weekend.

Kind regards,

Re: Moving back to recommended oil [Re: NAPSTER] #4751679
05/09/18 12:56 AM
05/09/18 12:56 AM
Joined: Feb 2014
Posts: 2,526
Canada
Lolvoguy Offline
Lolvoguy  Offline
Joined: Feb 2014
Posts: 2,526
Canada
In your climate, you can run either of them with no problems.
If you do go back to 10w40, you might notice an increase in fuel economy


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Re: Moving back to recommended oil [Re: NAPSTER] #4751684
05/09/18 01:31 AM
05/09/18 01:31 AM
Joined: Aug 2008
Posts: 3,220
Where the wind comes sweepin'
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,220
Where the wind comes sweepin'
How many kms were on the car when your girlfriend started using 20w50? I would imagine that a 14 year old car would have enough wear that changing oil weights would not be a concern.

Re: Moving back to recommended oil [Re: Lolvoguy] #4751685
05/09/18 01:36 AM
05/09/18 01:36 AM
Joined: May 2018
Posts: 5
Gauteng, South Africa
NAPSTER Offline OP
NAPSTER  Offline OP
Joined: May 2018
Posts: 5
Gauteng, South Africa
Thank you

Re: Moving back to recommended oil [Re: Reddy45] #4751686
05/09/18 01:37 AM
05/09/18 01:37 AM
Joined: May 2018
Posts: 5
Gauteng, South Africa
NAPSTER Offline OP
NAPSTER  Offline OP
Joined: May 2018
Posts: 5
Gauteng, South Africa
Originally Posted By: Reddy45
How many kms were on the car when your girlfriend started using 20w50? I would imagine that a 14 year old car would have enough wear that changing oil weights would not be a concern.


200 000km to 240 000km.

My concern is not having moved to the "heavier" oil, I am wondering if it would be ok to go back to the lighter oil.....?

Re: Moving back to recommended oil [Re: NAPSTER] #4751687
05/09/18 02:00 AM
05/09/18 02:00 AM
Joined: Oct 2012
Posts: 4,777
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,777
Taiwan
Originally Posted By: NAPSTER


I am in a unique position here.



I am in a unique position here, too.

In fact everyone is in a unique position, wherever they are.

But changing from thickish to slightly thinner oil doesn't seem likely to be unique.

Worrying about it enough to post a question on an obsessives self-help group forum is probably clinically, er, unusual, though.

Dr Ducked's opinion: Continue with the existing treatment until there are contraindications. Or not. It doesn't matter.

However, if you change and "notice" an improvement in fuel economy, keep it to yourself unless you've done a double-blind randomised trial.

Otherwise those placebo effects will embarrass you every time.

Last edited by Ducked; 05/09/18 02:02 AM.
Re: Moving back to recommended oil [Re: Ducked] #4751712
05/09/18 04:21 AM
05/09/18 04:21 AM
Joined: May 2018
Posts: 1,114
Tri State Conservative
Zee09 Offline
Zee09  Offline
Joined: May 2018
Posts: 1,114
Tri State Conservative
You sound uniquely unqualified. lol


"If I walked on water, they'd say I couldn't swim."
Re: Moving back to recommended oil [Re: Zee09] #4751715
05/09/18 05:04 AM
05/09/18 05:04 AM
Joined: Oct 2012
Posts: 4,777
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,777
Taiwan
Originally Posted By: Zee09
You sound uniquely unqualified. lol


Everyone is uniquely unqualified for something. That's what makes us special.

Re: Moving back to recommended oil [Re: NAPSTER] #4751750
05/09/18 06:23 AM
05/09/18 06:23 AM
Joined: Jun 2015
Posts: 4,278
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,278
New England
Originally Posted By: NAPSTER
Hi All.

I am in a unique position here.

My GF drives a 2004 Hyundai Getz 1.6. The oil that the OEM recommends to use is 10w40. She has, however, been driving the car with 20w50 for 1-2years now.

My Question is, should I go back to the recommended oil or should I keep using 20w50 now? I am just concerned that using 20w50 for such a long time may have changed the tollerances in the engine and if I now go back to 10w40 it will cause problems......?

Any help please as I am looking to do an oil service this weekend.

Kind regards,


Hi Napster, I am no engine expert but can't see that the 20W50 would have changed the engine at all.
You should be absolutely fine with using 10W40...however, if you tell our GF about the change, she will probably swear that the car feels worse and that it is all your fault. I know that's what my wife would do!
;^)


2014 Forester XT, 90000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter
Re: Moving back to recommended oil [Re: NAPSTER] #4751761
05/09/18 06:47 AM
05/09/18 06:47 AM
Joined: Dec 2006
Posts: 18,812
Dallas,Tx USA
aquariuscsm Offline
aquariuscsm  Offline
Joined: Dec 2006
Posts: 18,812
Dallas,Tx USA
No worries,you'll be good Cheers2

Go back to 10W40 and you'll probably feel the car "wake up" and be a lot more responsive.


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: Moving back to recommended oil [Re: Virtus_Probi] #4751763
05/09/18 06:53 AM
05/09/18 06:53 AM
Joined: Aug 2010
Posts: 5,734
Champlain/Hudson Valley
Kira Offline
Kira  Offline
Joined: Aug 2010
Posts: 5,734
Champlain/Hudson Valley
Here's a "funny anecdote" to confuse things a bit.

Friend's 1985 Subaru GL (1700 cc engine) called for 20W-50.
My 1976 Chevrolet Nova (250 CID I6) used 10W-30.

I tried the 20W-50 in the Chevy and the engine clicked and clicked upon start-up and never quieted down.

I after draining the 20W-50 I stayed with 10W-30 and never though of it again.

Re: Moving back to recommended oil [Re: NAPSTER] #4751768
05/09/18 07:06 AM
05/09/18 07:06 AM
Joined: Sep 2002
Posts: 2,308
VA
Gebo Offline
Gebo  Offline
Joined: Sep 2002
Posts: 2,308
VA
IF I am understanding you, you want to go back to the 10w-40. I would go back to the 10w-40. Then see how it goes. Napster, you know you wanna try it. grin

Last edited by Gebo; 05/09/18 07:06 AM.

'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 60K
Amsoil in all engines, transmissions and differentials

Re: Moving back to recommended oil [Re: NAPSTER] #4751864
05/09/18 09:36 AM
05/09/18 09:36 AM
Joined: Sep 2015
Posts: 5,951
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,951
Kalifornia Kollective
Does it use oil now (consume) between oil changes? Leaks, drips, weaps?

Does it run funny or make any noise on start-up? Any smoke at start-up?


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Moving back to recommended oil [Re: NAPSTER] #4751890
05/09/18 10:09 AM
05/09/18 10:09 AM
Joined: Sep 2013
Posts: 10,531
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,531
Indiana
No issues whatsoever. Try it, you may like it.

Listen to some Die Antwoord while you service it too. laugh


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: Moving back to recommended oil [Re: NAPSTER] #4752516
05/09/18 11:17 PM
05/09/18 11:17 PM
Joined: Jul 2015
Posts: 4,627
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,627
Down Under
Both 10W40 and 20W50 should work fine.

I would go a 15W40, maybe a mixed fleet HDEO (suitable for petrol and diesel). This should be thicker than most 10W40's but also offer more TBN (oil life) than most 20W50's.

The 20W50's near me are mostly old school SG stuff with a weak add pack.


Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154
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