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#1724734 - 12/30/09 11:02 AM Older car? thicker oil?
edwardh1 Offline


Registered: 01/17/03
Posts: 1840
Loc: Coastal South Carolina
If a car NEW uses 5w 30, when it gets say 110,000 miles on it should you put 10w 40 in it? to compensate for wear?
seems there is SOME wear in 100,000 miles.

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#1724742 - 12/30/09 11:09 AM Re: Older car? thicker oil? [Re: edwardh1]
coffee Offline


Registered: 03/11/07
Posts: 1116
Loc: Chandler, Arizona, USA
My cars have very high mileage and I am using MaxLife 5w20 in them with great results.You can use whatever grade you want and be fine as long as it is not a thick oil for a cold climate.
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#1724757 - 12/30/09 11:18 AM Re: Older car? thicker oil? [Re: coffee]
Captain_Klink Offline


Registered: 05/29/09
Posts: 610
Loc: Afghanistan
my 1995 dodge colt, 1.5l 12v 4 cylinder has 200,000 miles on it. everything is original. it is a daily driver. it does not get babied, and it does not get abused either. regular oil changes every 3k all its life with conventional oil.
currently i use 3 parts 5w30 and 1 part 5w20.
heavier oils actually INCREASE the wear. thinner oils flow faster and lubricate better, and keep the engine parts cooler. using a thicker oil is asking for trouble.

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#1724768 - 12/30/09 11:23 AM Re: Older car? thicker oil? [Re: edwardh1]
demarpaint Offline


Registered: 07/03/05
Posts: 22905
Loc: NY
Originally Posted By: edwardh1
If a car NEW uses 5w 30, when it gets say 110,000 miles on it should you put 10w 40 in it? to compensate for wear?
seems there is SOME wear in 100,000 miles.


Why? If it aint broke don't fix it.
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God Bless Our Troops


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#1724770 - 12/30/09 11:24 AM Re: Older car? thicker oil? [Re: Captain_Klink]
98dakarM3 Offline


Registered: 05/04/08
Posts: 95
Loc: Oregon
As a rule, no.

But sometimes it makes sense to use a thicker oil if you are trying to cure an issue such as oil burning.
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#1724775 - 12/30/09 11:30 AM Re: Older car? thicker oil? [Re: 98dakarM3]
bepperb Offline


Registered: 01/10/08
Posts: 4923
Loc: Milwaukee, WI
"As a rule, no.

But sometimes it makes sense to use a thicker oil if you are trying to cure an issue such as oil burning."

+1
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#1724814 - 12/30/09 11:49 AM Re: Older car? thicker oil? [Re: bepperb]
JHZR2 Offline



Registered: 12/14/02
Posts: 35762
Loc: New Jersey
Thicker has a slight correlation with less volatile, two schools of thought here, one, a less volatile oil will burn less in a consumption prone high mileage engine. However, a less volatile oil may also leave deposits, so it is a game of relevance.

Thicker willy-nilly for thickness sake without reason doesn't do anything for you, IMO.

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#1724819 - 12/30/09 11:55 AM Re: Older car? thicker oil? [Re: edwardh1]
tig1 Offline


Registered: 01/03/09
Posts: 10518
Loc: Illinois
Originally Posted By: edwardh1
If a car NEW uses 5w 30, when it gets say 110,000 miles on it should you put 10w 40 in it? to compensate for wear?
seems there is SOME wear in 100,000 miles.


If you have taken very good care of you engine then it would be NO. My sons 91 Ranger has 338,000 miles and still uses 10-30 M1. as it was when it was newish. I have had the same experience myself.
_________________________
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M1 10-30 in all OPE
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#1724833 - 12/30/09 12:08 PM Re: Older car? thicker oil? [Re: Captain_Klink]
Zaedock Offline


Registered: 09/10/05
Posts: 3857
Loc: Massachusetts
Originally Posted By: Captain_Klink
heavier oils actually INCREASE the wear. thinner oils flow faster and lubricate better, and keep the engine parts cooler. using a thicker oil is asking for trouble.


Misinformation.
_________________________
2012 F150 Ex-cab 5.0L/2004 Malibu Maxx LT
1992 YJ "The Heep"/1994 Olds Cutlass Ciera 3.1/auto
1975 Ford Bronco/1959 Willys CJ5/20XX Custom rock crawler

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#1724839 - 12/30/09 12:10 PM Re: Older car? thicker oil? [Re: tig1]
labman Offline


Registered: 03/14/03
Posts: 8711
Loc: Nothern USA
My 77 LUV with 144K still holds 60 psi oil running 70 on the interstate with 5W-30. The oil light never comes on at idle. Oh, I never have to add more oil either.

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#1724840 - 12/30/09 12:11 PM Re: Older car? thicker oil? [Re: Captain_Klink]
seremban Offline


Registered: 12/04/09
Posts: 17
Loc: Malaysia
Originally Posted By: Captain_Klink

heavier oils actually INCREASE the wear.


Can anyone explain why using heavier weight oil increase wear ?

Thank You.

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#1724848 - 12/30/09 12:20 PM Re: Older car? thicker oil? [Re: seremban]
Zaedock Offline


Registered: 09/10/05
Posts: 3857
Loc: Massachusetts
Originally Posted By: seremban
Originally Posted By: Captain_Klink

heavier oils actually INCREASE the wear.


Can anyone explain why using heavier weight oil increase wear ?

Thank You.


Thicker oils can't lubricate either. smirk

...and your engine will run hot.
_________________________
2012 F150 Ex-cab 5.0L/2004 Malibu Maxx LT
1992 YJ "The Heep"/1994 Olds Cutlass Ciera 3.1/auto
1975 Ford Bronco/1959 Willys CJ5/20XX Custom rock crawler

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#1724885 - 12/30/09 12:40 PM Re: Older car? thicker oil? [Re: edwardh1]
PT1 Offline


Registered: 02/06/07
Posts: 5746
Loc: near the mistake
Originally Posted By: edwardh1
If a car NEW uses 5w 30, when it gets say 110,000 miles on it should you put 10w 40 in it? to compensate for wear?
seems there is SOME wear in 100,000 miles.


No, 210,000 maybe. But 5w30 is fine all the way if you maintain the engine with reasonable oil change intervals.
_________________________
Oils well that ends well...

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#1724887 - 12/30/09 12:43 PM Re: Older car? thicker oil? [Re: labman]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
5-30 to 10-40 is a decent jump thicker.
I would never want that cold rating larger, only smaller [the 5 and 10 #s].
110K is not the great achievement it once was. It's not really a lot on a newer style car.
If you are not burning oil, there should be no reason to switch.
If there is an odd known problem like low oil pressure when hot, you cold try a thicker oil.

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#1724904 - 12/30/09 12:50 PM Re: Older car? thicker oil? [Re: edwardh1]
Nickdfresh Offline


Registered: 03/15/06
Posts: 3935
Loc: Buffalo, NY
Originally Posted By: edwardh1
If a car NEW uses 5w 30, when it gets say 110,000 miles on it should you put 10w 40 in it? to compensate for wear?
seems there is SOME wear in 100,000 miles.


Ten to fifteen years ago, maybe--as a general rule. Now, not-so-much, unless there has been a history of lack of maintenance, severe service, excessive consumption, etc.

That being said, almost all "high mileage" oils are thicker at temp in the same grades, which is why I would only ever use one in the warmer months...

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