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High mileage oil additive #4470979
07/26/17 12:35 PM
07/26/17 12:35 PM
Joined: Mar 2012
Posts: 200
Southern NY
MoneyJohn Offline OP
MoneyJohn  Offline OP
Joined: Mar 2012
Posts: 200
Southern NY
Hello folks,

A friend of mine has 2006 Accord (~119000 miles) that has developed a minor leak. His mechanic suggested using some high mileage oil to see if it fixes the leak as he doesn't want to spend to fix the leak (He plans to trade in this car within a year). He has about a couple of gallons of regular oil stocked up and he would like to add the additive to this oil so that he can use it up. Is there any additive that can be mixed with the regular 5W-20 oil to turn it into high mileage oil?

My idea of just getting high mileage oil isn't getting any traction.

Thanks in advance.


2015 Subaru Forester 2.5i Premium w/ EyeSight
2006 Nissan Sentra 1.8S Special Edition
Re: High mileage oil additive [Re: MoneyJohn] #4470990
07/26/17 12:40 PM
07/26/17 12:40 PM
Joined: Jul 2005
Posts: 30,415
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,415
NY
The high mileage oil sounds like a plan to me. I wouldn't be messing with additives for stopping oil leaks.


God Bless Our Troops

Re: High mileage oil additive [Re: MoneyJohn] #4470999
07/26/17 12:59 PM
07/26/17 12:59 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: MoneyJohn
He has about a couple of gallons of regular oil stocked up and he would like to add the additive to this oil .....


No, save that oil foe the "next car"

Just buy some cheap HM oil and use that.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: High mileage oil additive [Re: MoneyJohn] #4471001
07/26/17 01:00 PM
07/26/17 01:00 PM
Joined: May 2012
Posts: 94
Marietta, GA
TOMJ Offline
TOMJ  Offline
Joined: May 2012
Posts: 94
Marietta, GA
Mobil 1 5w-30 high mileage oil would be a good choice. We have a '93 Civic with almost 300,000 miles on it that had slight leaks from both front and rear main seals.
For years we ran Mobil Super high mileage 5w-30 and then switched to the full synth high mileage in order to extend the OCI and within 500 miles the leaks stopped.


1992 GMC C1500 Mobil 1 HM
1993 Honda Civic Mobil 1 HM

2007 Honda VTX1300 R Mobil 1 HM

2006 Sea Doo GTI SE Mobil Delvac
2008 Yamaha F115 Mobil Delvac
Re: High mileage oil additive [Re: MoneyJohn] #4471004
07/26/17 01:05 PM
07/26/17 01:05 PM
Joined: Aug 2014
Posts: 1,453
Gulf Coast, MS
3800Series Offline
3800Series  Offline
Joined: Aug 2014
Posts: 1,453
Gulf Coast, MS
Yeah I would stick to HM oil myself. Not all additives are made the same. Some help rejuvenate the seals with plasticizers which can be safe with moderation while others just use a strong dissolvent which eat away at the gaskets causing them to turn very soft and expand but virtually destroy them.

Oil companies spend a lot developing their blends and will not want to ruin their brand over a cheap quick fix. They are temporary fixes while HM can work for a long time with regular use. Would help the car and the next owner too. A lot of people want to chuck their problems at others.

Doesn't hurt nor cost much more to show some pride of ownership and at least try and help solve the problem if they are not interested in fixing it correctly.

Re: High mileage oil additive [Re: MoneyJohn] #4471036
07/26/17 01:37 PM
07/26/17 01:37 PM
Joined: Aug 2010
Posts: 5,675
WatUpDoc
ltslimjim Offline
ltslimjim  Offline
Joined: Aug 2010
Posts: 5,675
WatUpDoc
I have always had good results with MaxLife.

They even offer a fully synthetic High Mileage and WM carries it now at a great price.

No additives. Just oil.

Additives where necessary if nothing else fails.

Any HM is worth a try though.


92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup
Re: High mileage oil additive [Re: MoneyJohn] #4471054
07/26/17 01:56 PM
07/26/17 01:56 PM
Joined: Jan 2008
Posts: 10,645
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,645
OH
He should change out the pcv valve on the car with an oem unit. Usually the internal spring breaks around the 60k mark.

Re: High mileage oil additive [Re: MoneyJohn] #4471064
07/26/17 02:06 PM
07/26/17 02:06 PM
Joined: Jan 2005
Posts: 4,315
FL
asiancivicmaniac Offline
asiancivicmaniac  Offline
Joined: Jan 2005
Posts: 4,315
FL
Bars Leak Rear Main Seal and Lubro Moly Oil Saver may help. They're not magic in a can though.


2002 Nissan Maxima (beater): Napa Syn 5W-30, Proline 14459
2016 Ford Fiesta ST (fun car): Castrol Edge 0W-40, Bosch D3330
Re: High mileage oil additive [Re: MoneyJohn] #4471095
07/26/17 02:45 PM
07/26/17 02:45 PM
Joined: Aug 2010
Posts: 5,675
WatUpDoc
ltslimjim Offline
ltslimjim  Offline
Joined: Aug 2010
Posts: 5,675
WatUpDoc
Agreed on PCV valve replacement.


92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup
Re: High mileage oil additive [Re: TOMJ] #4471144
07/26/17 03:53 PM
07/26/17 03:53 PM
Joined: Feb 2014
Posts: 133
ga
faltic Offline
faltic  Offline
Joined: Feb 2014
Posts: 133
ga
Originally Posted By: TOMJ
then switched to the full synth high mileage in order to extend the OCI and within 500 miles the leaks stopped.


Was that a Mobile synth high mileage and if so which one?


--------------------------------
17 Highlander 3.5 2wd AT 10K+
95 Tacoma 2.4 2wd AT 187k+
07 EX250 21k+
09 EN500 11k+
11 PCX 125 4K+
Re: High mileage oil additive [Re: MoneyJohn] #4471247
07/26/17 05:53 PM
07/26/17 05:53 PM
Joined: Sep 2007
Posts: 966
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 966
TX, USA
What is minor leak?

IMO, I will try to id where the leak is and see if it can be fixed DIY cheaply.
Go from there.

What if that minor leak becomes big leak before the 1 year or that minor leak can cause the engine to fail?


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: High mileage oil additive [Re: MoneyJohn] #4471318
07/26/17 07:22 PM
07/26/17 07:22 PM
Joined: Jul 2011
Posts: 965
Missouri
cb_13 Offline
cb_13  Offline
Joined: Jul 2011
Posts: 965
Missouri
In the past I used Valvoline's Maxlife Oil Additive. I was mixing it with VWB I bought on sale. Do they even sell the Maxlife additive anymore?

Re: High mileage oil additive [Re: JMJNet] #4471771
07/27/17 09:21 AM
07/27/17 09:21 AM
Joined: Mar 2012
Posts: 200
Southern NY
MoneyJohn Offline OP
MoneyJohn  Offline OP
Joined: Mar 2012
Posts: 200
Southern NY
Can anyone elaborate on the PCV valve connection to the leak?


Originally Posted By: JMJNet
What is minor leak?

IMO, I will try to id where the leak is and see if it can be fixed DIY cheaply.
Go from there.

What if that minor leak becomes big leak before the 1 year or that minor leak can cause the engine to fail?

All valid questions that have already been raised but he doesn't want to see it that way. Hence, I am in no mood to touch his car so I am trying to help 'at the periphery'. He can do all he wants. I would not drive a car knowing something is not right, be it a minor leak.

Last edited by MoneyJohn; 07/27/17 09:21 AM.

2015 Subaru Forester 2.5i Premium w/ EyeSight
2006 Nissan Sentra 1.8S Special Edition
Re: High mileage oil additive [Re: MoneyJohn] #4472226
07/27/17 05:47 PM
07/27/17 05:47 PM
Joined: Aug 2010
Posts: 5,675
WatUpDoc
ltslimjim Offline
ltslimjim  Offline
Joined: Aug 2010
Posts: 5,675
WatUpDoc
PCV valve helps with crankcase ventilation. Useless, a plugged PCV system/valve results in oil consumption, not leaks. It is worth checking to ensure proper crankcase gas movement. I don't know if they could lead to increase pressure but they certainly can affect piston oil control ring functionality if neglected over time. Not sure if it would directly affect engine seals.


92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup
Re: High mileage oil additive [Re: ltslimjim] #4473202
07/28/17 04:53 PM
07/28/17 04:53 PM
Joined: Mar 2012
Posts: 200
Southern NY
MoneyJohn Offline OP
MoneyJohn  Offline OP
Joined: Mar 2012
Posts: 200
Southern NY
Originally Posted By: ltslimjim
PCV valve helps with crankcase ventilation. Useless, a plugged PCV system/valve results in oil consumption, not leaks. It is worth checking to ensure proper crankcase gas movement. I don't know if they could lead to increase pressure but they certainly can affect piston oil control ring functionality if neglected over time. Not sure if it would directly affect engine seals.

Thank you


2015 Subaru Forester 2.5i Premium w/ EyeSight
2006 Nissan Sentra 1.8S Special Edition

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