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#4785429 - 06/13/18 02:31 AM Oil leaks and/or engine damage by high speeds?
Jaha24k Offline


Registered: 06/12/18
Posts: 20
Loc: So Cal
Hello
Can extended high speed runs on the highway (80+ mph) lead to oil leaks or other engine issues? What about accelerating too quickly from a stop?

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#4785433 - 06/13/18 02:44 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
Ikken Offline


Registered: 06/12/18
Posts: 5
Loc: Hungary
Hi Jaha24k,

That can happen ONLY if you switched from dino oil to synth in specific cases. Detergents might clean gunk at seals which were sealing before thus they start to release some fluids. There are seal swell additives today in synths, so this is generally not a problem.

To answer your original question no, high speed should not harm the lubrication system, it is designed to be holding much more pressure. Of course there is a bigger stress on seals if the engine RPMs are higher due to the oil pressure, but that's all. If there is a leak, that is a sign of seal failure, it's not really about user error. Usually oil filter housing seals (if there are) give up the fight first, as they get the highest pressure most of the time.

One thing can cause leaking though - which is overfilling the engine with oil, causing higher crankcase pressures in general.
_________________________
'93 BMW E36 320i M50B20TU EU - Mannol 7719 0w-40/5000miles
'90 Trabant 1.1 - Mannol Defender 10w-40/7000 miles
'03 Suzuki SV650N Mannol Elite 5w-40/3000 miles

Changing on time keeps your eye dry!

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#4785436 - 06/13/18 02:54 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Ikken]
ragtoplvr Offline


Registered: 01/14/15
Posts: 529
Loc: missouri
Originally Posted By: Ikken
Hi Jaha24k,

That can happen ONLY if you switched from dino oil to synth in specific cases. Detergents might clean gunk at seals which were sealing before thus they start to release some fluids. There are seal swell additives today in synths, so this is generally not a problem.


OMG you stepped in it here.

Rod

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#4785458 - 06/13/18 04:49 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
dlundblad Offline


Registered: 09/30/13
Posts: 10063
Loc: Indiana
Originally Posted By: Jaha24k
Hello
Can extended high speed runs on the highway (80+ mph) lead to oil leaks or other engine issues? What about accelerating too quickly from a stop?


What sort of RPM's is this?

Your engine shouldn't be working that hard so to answer your question, no.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4785478 - 06/13/18 05:35 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
ka9mnx Offline


Registered: 05/21/18
Posts: 59
Loc: South Carolina
High speed driving, no. Hard/fast accelerating puts unnecessary load on the entire drivetrain.


Edited by ka9mnx (06/13/18 05:37 AM)
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#4785510 - 06/13/18 06:44 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
rooflessVW Online   content


Registered: 12/24/11
Posts: 4102
Loc: North Carolina
No. If it were so my cars would have oil coming from everywhere.
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#4785518 - 06/13/18 06:58 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
Ducked Offline


Registered: 10/25/12
Posts: 4395
Loc: Taiwan
Yes.

Posters above are talking about what should/shouldn't happen. That isn't the same as what can or does happen.

Bad things can and do happen, and the stress of high speed running/high acceleration is likely to expose any weakness that exists.

For example, I thought I'd popped my head gasket a while ago with a bit of high speed running of my ancient 3cyl. Turned out I hadn't (probably), (though I had popped an exhaust gasket) but I certainly could have.

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#4785530 - 06/13/18 07:10 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2776
Loc: Wet side WA
Maybe that's why the most blown engines you see are on drag strips?
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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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#4785541 - 06/13/18 07:21 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
mightymousetech Offline


Registered: 04/03/17
Posts: 1444
Loc: Ontario, Canada
80 MPH is now considered high speed?

If that were true, every car in Germany would need a new engine weekly.



Anyways, that is probably the best thing you can do for an engine. Nice lean burn, runs hot, keeps everything clean.


Edited by mightymousetech (06/13/18 07:24 AM)
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#4785550 - 06/13/18 07:32 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
Ikken Offline


Registered: 06/12/18
Posts: 5
Loc: Hungary
Exactly, just as mightymousetech says above me. A gently warmed engine running oil in the 90-105ish degrees celsius range can be revved like there is no tomorrow. Should not cause any issue at all. When driving in the high rpm range, more frequent oil level check is recommended though.
_________________________
'93 BMW E36 320i M50B20TU EU - Mannol 7719 0w-40/5000miles
'90 Trabant 1.1 - Mannol Defender 10w-40/7000 miles
'03 Suzuki SV650N Mannol Elite 5w-40/3000 miles

Changing on time keeps your eye dry!

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#4785567 - 06/13/18 07:47 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
Trav Offline


Registered: 11/20/06
Posts: 18911
Loc: MA, Mittelfranken.de
Not at all, 80 mph is no where near high speed.
As long as the crankcase vent system is good condition there should be not real pressure or vacuum in the crankcase. A clogged PVC or intake hose can cause issues that may be exacerbated at higher rpm's.

Oil leaks from seals generally happen for a number of reasons.

Loss of seal pliability or cracking due to aging or deposit buildup.
Wear of the seal face or rotating part wear, in which case you need to sleeve the rotation part and replace the seal.
Loss of tension on the seals spring (less common).
Excess pressure or vacuum due to faulty crankcase ventilation system on either the fresh air or PCV/scavenger side. air must flow in at least equally for it to work properly.
Improper installation.
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#4785578 - 06/13/18 07:59 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
toneydoc Offline


Registered: 12/16/11
Posts: 1696
Loc: War Eagle
80+ mph is not high speed
Fast acceleration eats gasoline and may cause some strain on drive train.
Cause any leaks? Not a chance
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#4785586 - 06/13/18 08:07 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Ducked]
dlundblad Offline


Registered: 09/30/13
Posts: 10063
Loc: Indiana
Originally Posted By: Ducked
Yes.

Posters above are talking about what should/shouldn't happen. That isn't the same as what can or does happen.

Bad things can and do happen, and the stress of high speed running/high acceleration is likely to expose any weakness that exists.


Your car is patched together with chop sticks... I can see why you think the way you do.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4785629 - 06/13/18 08:52 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Trav]
CT8 Offline


Registered: 10/09/14
Posts: 11025
Loc: Idaho
Originally Posted By: Trav
Not at all, 80 mph is no where near high speed.
As long as the crankcase vent system is good condition there should be not real pressure or vacuum in the crankcase. A clogged PVC or intake hose can cause issues that may be exacerbated at higher rpm's.

Oil leaks from seals generally happen for a number of reasons.

Loss of seal pliability or cracking due to aging or deposit buildup.
Wear of the seal face or rotating part wear, in which case you need to sleeve the rotation part and replace the seal.
Loss of tension on the seals spring (less common).
Excess pressure or vacuum due to faulty crankcase ventilation system on either the fresh air or PCV/scavenger side. air must flow in at least equally for it to work properly.
Improper installation.

Trav is the Master !!! approved approved approved approved approved
_________________________
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Geoff Metcalf

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#4785661 - 06/13/18 09:16 AM Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k]
WobblyElvis Offline


Registered: 09/23/14
Posts: 1355
Loc: Toronto Canada
I tend to drive very old cars so my experience is this.
As an engine ages it lets more combustion gases pass by the pistons and rings. This adds pressure to the crankcase. At high speeds the throttle is open more and the corresponding vacuum applied by the PCV is less and therefore if you have seals or gaskets that are marginal, you are more likely to have oil leaks.

What is high speed driving? Again in my experience, above 80mph is high speed driving for a 4 cylinder car or a large cube van with a V8. Engines don't want to be worked above about %20 throttle for any length of time. I notice the OLM on my 4 cylinder car counts down fast if I cruise above 70mph indicating GM thinks this is hard on the oil.

I ain't no engineer.


Edited by WobblyElvis (06/13/18 09:18 AM)

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