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#4578210 - 11/18/17 06:04 PM Should I use 10w30?
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
I have a 286k miles 01 Corolla, it has used 20w50 oil its entire life. Can I use a 10w30 oil after so many years of thick oil?

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#4578213 - 11/18/17 06:12 PM Re: Should I use 10w30? [Re: Emanuel]
JustN89 Offline


Registered: 06/27/17
Posts: 470
Loc: DFW
Is there a reason you are wanting to use a 10W-30 over the 20W-50? If I remember right, you're car is burning a lot of oil as it is and I don't think any weight/viscosity/brand/etc will fix it.

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#4578216 - 11/18/17 06:15 PM Re: Should I use 10w30? [Re: Emanuel]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
No. The engine is already stretched out from all those years of 20W-50.
If you go with 10W-30 now, you're not going to have any oil pressure.

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#4578228 - 11/18/17 06:23 PM Re: Should I use 10w30? [Re: Merkava_4]
Charlie2015 Online   content


Registered: 04/24/15
Posts: 238
Loc: Georgia
Originally Posted By: Merkava_4
No. The engine is already stretched out from all those years of 20W-50.
If you go with 10W-30 now, you're not going to have any oil pressure.


Good point. I would recommend only Maxlife 20w50 at this point
_________________________
1998 Honda Accord EX 2.3L Auto
2009 Scion TC Manual

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#4578237 - 11/18/17 06:31 PM Re: Should I use 10w30? [Re: Emanuel]
SwampRabbit Offline


Registered: 11/17/17
Posts: 5
Loc: Mississippi
10W30 won't harm your engine at all. But, you might want to use a 10W40 before trying the 10W30.
I have built a few engines that I have switched from 20W50 to 5W30, 5W40, and sometimes just straight 30 weight. And, the oil pressure is always good no matter which oil wt. I use.

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#4578240 - 11/18/17 06:34 PM Re: Should I use 10w30? [Re: Emanuel]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2740
Loc: Wet side WA
LOL Emanuel you've been beating this to death for nearly a month now. I think its about ran out of mileage. Pull a new car under that oil fill cap!
_________________________
2004 Toyota Corolla 121682
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4578248 - 11/18/17 06:40 PM Re: Should I use 10w30? [Re: JohnnyJohnson]
SilverSnake Offline


Registered: 05/29/13
Posts: 591
Loc: Florida
Originally Posted By: JohnnyJohnson
LOL Emanuel you've been beating this to death for nearly a month now. I think its about ran out of mileage. Pull a new car under that oil fill cap!


Now this makes a lot of sense.
_________________________
2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 5.7L-360 HP (PUP 5W-20)
2008 20KW Generac (Amsoil 10W-30/30)

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#4578255 - 11/18/17 06:49 PM Re: Should I use 10w30? [Re: Emanuel]
kschachn Offline


Registered: 12/26/05
Posts: 9395
Loc: Upper Midwest
I don't know how the engine would know it had used 20W-50 before and would be somehow upset you changed the grade.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4578259 - 11/18/17 06:54 PM Re: Should I use 10w30? [Re: Emanuel]
fdcg27 Offline


Registered: 09/25/09
Posts: 15696
Loc: OH
Originally Posted By: Emanuel
I have a 286k miles 01 Corolla, it has used 20w50 oil its entire life. Can I use a 10w30 oil after so many years of thick oil?


You can use whatever grade you want but you might see higher consumption going down to a 10W-30.
If this little guy has done 286K on 20W-50, then why would you want to change now?
You've nearly doubled the design life of this car, so you must have been doing something right in your oil grade selection.
_________________________
17 Forester 12K MSS 0W-20
12 Accord LX 86K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i

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#4578260 - 11/18/17 06:55 PM Re: Should I use 10w30? [Re: Merkava_4]
Warstud Online   content


Registered: 09/02/05
Posts: 5395
Loc: MIchigan
Originally Posted By: Merkava_4
If you go with 10W-30 now, you're not going to have any oil pressure.


And....The engine will blow up ?

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#4578278 - 11/18/17 07:16 PM Re: Should I use 10w30? [Re: Warstud]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: Warstud
And....The engine will blow up ?


Do engines blow up when they run out of oil pressure ? I would think they come to a very quiet stop.

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#4578293 - 11/18/17 07:38 PM Re: Should I use 10w30? [Re: Emanuel]
ZZman Online   content


Registered: 03/17/08
Posts: 5780
Loc: Michigan
I never knew oil could stretch an engine out.
_________________________
2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40

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#4578296 - 11/18/17 07:39 PM Re: Should I use 10w30? [Re: Merkava_4]
SwampRabbit Offline


Registered: 11/17/17
Posts: 5
Loc: Mississippi
Originally Posted By: Merkava_4
Originally Posted By: Warstud
And....The engine will blow up ?


Do engines blow up when they run out of oil pressure ? I would think they come to a very quiet stop.

I have seen Chevy engines run with 2 psi of oil pressure. These engines are candidates for a MELLING HV oil pump and KENDALL NITRO 70 wt. oil.

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#4578317 - 11/18/17 08:01 PM Re: Should I use 10w30? [Re: ZZman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: ZZman
I never knew oil could stretch an engine out.


Some fluids are incompressible; motor oil is one of them. If you go and force it through a clearance and the clearance puts up enough resistance because it's so tight, that clearance is going to get expanded because motor oil is a ruthless hombre.

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#4578338 - 11/18/17 08:26 PM Re: Should I use 10w30? [Re: ZZman]
zeng Offline


Registered: 09/01/15
Posts: 2188
Loc: Malaysia
Originally Posted By: ZZman
I never knew oil could stretch an engine out.

On Bitog, it does. blush

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