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#4751673 - 05/09/18 12:50 AM Moving back to recommended oil
NAPSTER Offline


Registered: 05/08/18
Posts: 5
Loc: 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,

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#4751679 - 05/09/18 12:56 AM Re: Moving back to recommended oil [Re: NAPSTER]
Lolvoguy Offline


Registered: 02/06/14
Posts: 2221
Loc: 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
03 Suzuki SV650S- One night stand

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#4751684 - 05/09/18 01:31 AM Re: Moving back to recommended oil [Re: NAPSTER]
Reddy45 Offline


Registered: 08/15/08
Posts: 2879
Loc: USA
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.

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#4751685 - 05/09/18 01:36 AM Re: Moving back to recommended oil [Re: Lolvoguy]
NAPSTER Offline


Registered: 05/08/18
Posts: 5
Loc: Gauteng, South Africa
Thank you

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#4751686 - 05/09/18 01:37 AM Re: Moving back to recommended oil [Re: Reddy45]
NAPSTER Offline


Registered: 05/08/18
Posts: 5
Loc: 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.....?

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#4751687 - 05/09/18 02:00 AM Re: Moving back to recommended oil [Re: NAPSTER]
Ducked Offline


Registered: 10/25/12
Posts: 4225
Loc: 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.


Edited by Ducked (05/09/18 02:02 AM)

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#4751712 - 05/09/18 04:21 AM Re: Moving back to recommended oil [Re: Ducked]
Zee09 Offline


Registered: 05/05/18
Posts: 142
Loc: W. Palm
You sound uniquely unqualified. lol

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#4751715 - 05/09/18 05:04 AM Re: Moving back to recommended oil [Re: Zee09]
Ducked Offline


Registered: 10/25/12
Posts: 4225
Loc: Taiwan
Originally Posted By: Zee09
You sound uniquely unqualified. lol


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

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#4751750 - 05/09/18 06:23 AM Re: Moving back to recommended oil [Re: NAPSTER]
Virtus_Probi Offline


Registered: 06/25/15
Posts: 3934
Loc: 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, 80500 miles
Last Change;
Valvoline Full Synthetic 5W30 d1G2
Tokyo Roki 15208AA170 filter

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#4751761 - 05/09/18 06:47 AM Re: Moving back to recommended oil [Re: NAPSTER]
aquariuscsm Offline


Registered: 12/30/06
Posts: 18044
Loc: 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)
Pennzoil Platinum 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum 0W20



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#4751763 - 05/09/18 06:53 AM Re: Moving back to recommended oil [Re: Virtus_Probi]
Kira Offline


Registered: 08/19/10
Posts: 5056
Loc: 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.

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#4751768 - 05/09/18 07:06 AM Re: Moving back to recommended oil [Re: NAPSTER]
Gebo Online   content


Registered: 09/18/02
Posts: 2049
Loc: 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


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


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#4751864 - 05/09/18 09:36 AM Re: Moving back to recommended oil [Re: NAPSTER]
BrocLuno Offline


Registered: 09/06/15
Posts: 5394
Loc: 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.

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#4751890 - 05/09/18 10:09 AM Re: Moving back to recommended oil [Re: NAPSTER]
dlundblad Offline


Registered: 09/30/13
Posts: 9829
Loc: 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 197k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 170k M1 0w40 Mann HU819X
97 Chevy Blazer 4.3 142k Rotella T5 10w30 Fram TG3980


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#4752516 - 05/09/18 11:17 PM Re: Moving back to recommended oil [Re: NAPSTER]
SR5 Offline


Registered: 07/07/15
Posts: 4375
Loc: 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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