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Oil leaks and/or engine damage by high speeds? #4785429
06/13/18 02:31 AM
06/13/18 02:31 AM
Joined: Jun 2018
Posts: 48
So Cal
Jaha24k Offline OP
Jaha24k  Offline OP
Joined: Jun 2018
Posts: 48
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?

Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785433
06/13/18 02:44 AM
06/13/18 02:44 AM
Joined: Jun 2018
Posts: 5
Hungary
Ikken Offline
Ikken  Offline
Joined: Jun 2018
Posts: 5
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!
Re: Oil leaks and/or engine damage by high speeds? [Re: Ikken] #4785436
06/13/18 02:54 AM
06/13/18 02:54 AM
Joined: Jan 2015
Posts: 611
missouri
ragtoplvr Offline
ragtoplvr  Offline
Joined: Jan 2015
Posts: 611
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

Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785458
06/13/18 04:49 AM
06/13/18 04:49 AM
Joined: Sep 2013
Posts: 10,447
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,447
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 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: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785478
06/13/18 05:35 AM
06/13/18 05:35 AM
Joined: May 2018
Posts: 196
South Carolina
ka9mnx Offline
ka9mnx  Offline
Joined: May 2018
Posts: 196
South Carolina
High speed driving, no. Hard/fast accelerating puts unnecessary load on the entire drivetrain.

Last edited by ka9mnx; 06/13/18 05:37 AM.

2005 Ranger Edge 3.0 M1 5w-30 HM/Motorcraft
2000 Toyota 4Runner 3.4 M1 10w-30 HM/Toyota
1997 B2500 Van 3.9 M1 10w-30 HM/Mopar
1993 F150 4.9 M1 10w-30 HM/Motorcraft
Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785510
06/13/18 06:44 AM
06/13/18 06:44 AM
Joined: Dec 2011
Posts: 4,738
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,738
North Carolina
No. If it were so my cars would have oil coming from everywhere.


"Zed's dead baby, Zed's dead."
Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785518
06/13/18 06:58 AM
06/13/18 06:58 AM
Joined: Oct 2012
Posts: 4,602
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,602
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.

Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785530
06/13/18 07:10 AM
06/13/18 07:10 AM
Joined: Oct 2009
Posts: 3,213
Wet side WA
JohnnyJohnson Online content
JohnnyJohnson  Online Content
Joined: Oct 2009
Posts: 3,213
Wet side WA
Maybe that's why the most blown engines you see are on drag strips?


2004 Corolla 124705
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785541
06/13/18 07:21 AM
06/13/18 07:21 AM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
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.

Last edited by mightymousetech; 06/13/18 07:24 AM.

Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785550
06/13/18 07:32 AM
06/13/18 07:32 AM
Joined: Jun 2018
Posts: 5
Hungary
Ikken Offline
Ikken  Offline
Joined: Jun 2018
Posts: 5
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!
Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785567
06/13/18 07:47 AM
06/13/18 07:47 AM
Joined: Nov 2006
Posts: 19,906
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,906
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.


ASE L1, Master. Deutsch Meisterbrief.
Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785578
06/13/18 07:59 AM
06/13/18 07:59 AM
Joined: Dec 2011
Posts: 1,732
War Eagle
toneydoc Offline
toneydoc  Offline
Joined: Dec 2011
Posts: 1,732
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


1994 Jeep 159k Mobil 5000 5w30
2014 Camry 34k Havoline 5w20
2018 Jeep Cherokee 2k FactFill
2014 HD Ultra 40k Mobil1 15w50
2012 Rav4 37k Pennzoil Platinum 5w20
Re: Oil leaks and/or engine damage by high speeds? [Re: Ducked] #4785586
06/13/18 08:07 AM
06/13/18 08:07 AM
Joined: Sep 2013
Posts: 10,447
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,447
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 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: Oil leaks and/or engine damage by high speeds? [Re: Trav] #4785629
06/13/18 08:52 AM
06/13/18 08:52 AM
Joined: Oct 2014
Posts: 11,832
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,832
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


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: Oil leaks and/or engine damage by high speeds? [Re: Jaha24k] #4785661
06/13/18 09:16 AM
06/13/18 09:16 AM
Joined: Sep 2014
Posts: 1,446
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,446
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.

Last edited by WobblyElvis; 06/13/18 09:18 AM.
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