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General thoughts on high milage oils. #5442063 05/29/20 07:09 PM
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tblt44 Offline OP
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I have a slight rear main leak on a 06 tahoe.200+ miles.
Blows back on exhaust and leaks on garage floor slightly. Not a big leak.
I used Valvoline 5w 30 syn maxlife.
Valvoline 10w 30 syn maxlife
Now supertech 5w 30 Hm.
The supertech seams to leak more than valvoline.
Thinking mobil 1 syn hm 5w30 or 10w 30 or castrol edge hm 5w 30 or 10w 30 next.
I'm leaning toward edge hm 10w 30.
Anyone used edge hm. Does not seam too popular

I'm sure most will say fix it. I dont feel like doing it or paying to have it done.

Last edited by tblt44; 05/29/20 07:10 PM.

2003 Avalanche Z71 5.3
2006 Tahoe 5.3
1989 Yamaha moto 4 250
2004 Key Largo w/70 Yamaha 2 stroke
Re: General thoughts on high milage oils. [Re: tblt44] #5442065 05/29/20 07:13 PM
Joined: Aug 2017
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sloinker Offline
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There is only so much oil can do to repair a mechanical problem.


'16 Tiguan TSI Vaico 5W40
'15 VW Golf TDI Red Line 5W30 Euro
'15 VW Golf Sportwagen TDI M1 ESP 5W30
'14 Dodge Grand Caravan 3.6 Valvoline 5W20 Semi Synthetic
'64 Plymouth Fury440 Pending
Re: General thoughts on high milage oils. [Re: tblt44] #5442069 05/29/20 07:18 PM
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The_Nuke Offline
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I had a very similar situation to yours in my Charger. A small drip was dried up with several OCIs of Maxlife 10w-30 and one of 5w-30 MaxLife.

Then a sudden switch to ST HM synthetic 10w-30 seemingly restarted the drip. A couple OCIs of M1 HM syn 10w-30 slowed it back to barely a coating on underside of engine with occasional drops.

Subsequent OCIs have all been MaxLife 5-30 or 10w-30, and the drop has once again dried up.

Coincidence? Maybe, but it’s one heck of one if so, and I’m going to continue to use the Valvoline Maxlife regardless.


2012 Charger Pursuit aka "The Bacon Hauler"
- 5.7L + NAG1 (A5) + 3.07 (215mm)
Re: General thoughts on high milage oils. [Re: tblt44] #5442080 05/29/20 07:28 PM
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tblt44 Offline OP
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I have ran synthetic for the full 200k but was thinking maybe a syn blend castrol or maxlife may slow it down. I'm change oil about every 5k, about 30% oil life.


2003 Avalanche Z71 5.3
2006 Tahoe 5.3
1989 Yamaha moto 4 250
2004 Key Largo w/70 Yamaha 2 stroke
Re: General thoughts on high milage oils. [Re: tblt44] #5442086 05/29/20 07:34 PM
Joined: Sep 2005
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Zaedock Offline
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I've always had good luck with STHM. It helped a slight rear main seal on my wife's old Malibu Maxx.
That said, Maxlife is an outstanding oil and many here have had very good experiences with it.

I picked up a 6qt box of Havoline SB HM 5W20 I'm going to use in my F150. Not that I need HM at only 72K, but the deal was good at $12/box

The Havoline HM was purchased online at Walmart. Might be another option for you.


2019 Escape EB AWD/2016 KIA Optima SXL 2.0L Turbo/2012 F150 Ex-cab 5.0L
1992 YJ "The Heep"/2015 Chrysler 200 Limited
1975 Ford Bronco/1959 Willys CJ5/Tube Rock crawler
Re: General thoughts on high milage oils. [Re: tblt44] #5442092 05/29/20 07:40 PM
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Chris142 Offline
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Smitty Super-S high milage oil completly stopped the leaks and oil burning in our 04 tahoe. It took a few thousand miles. Not overnight.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: General thoughts on high milage oils. [Re: tblt44] #5442109 05/29/20 08:03 PM
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gfh77665 Offline
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In Fl, stay with the Valvoline 10w 30 syn Maxlife. It s probably the highest regarded HM oil here.

Re: General thoughts on high milage oils. [Re: tblt44] #5442133 05/29/20 09:16 PM
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ka9mnx Offline
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M1 HM 10w-30 worked for me on a seeping rear main seal in the F150. But as others have said, it takes a few thousand miles.


2005 Ranger 3.0 - SuperTech Syn 0w-20/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: General thoughts on high milage oils. [Re: tblt44] #5442144 05/29/20 09:37 PM
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Hermann Offline
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Have had good result in 3 different vehicles with Valvoline Maxlife products. Slowed the pushrod tube seal leaks on a BMW motorcycle, gave new life to a 15 yr old push mower, and somehow slowed a invisible coolant leak in a Honda Accord. After topping off a normal oil with a qt of Maxlife that was in the garage. About a month later I noticed the very slow drop in coolant reservoir had ceased. Never had to add coolant again. VooDoo I think.


Last edited by Hermann; 05/29/20 09:38 PM. Reason: Additional vital information LOL

2018 Ford F-150 XL Reg Cab - 3.3L NA V-6
Motorcraft 5w-20 Syn Blend and Motorcraft FL-500s

1991 BMW R100GS 20w-50 Maxlife & Mahle OX36D filter
Re: General thoughts on high milage oils. [Re: gfh77665] #5442147 05/29/20 09:44 PM
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Hermann Offline
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Originally Posted by gfh77665
In Fl, stay with the Valvoline 10w 30 syn Maxlife. It s probably the highest regarded HM oil here.

Very low Noack on that 10w-30


2018 Ford F-150 XL Reg Cab - 3.3L NA V-6
Motorcraft 5w-20 Syn Blend and Motorcraft FL-500s

1991 BMW R100GS 20w-50 Maxlife & Mahle OX36D filter
Re: General thoughts on high milage oils. [Re: tblt44] #5442148 05/29/20 09:49 PM
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Donald Offline
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The HM oil will/should cause the seal to swell enough to stop or slow down the leak., if the shaft is in perfect condition. If the shaft is not in perfect condition then all bets are off.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: General thoughts on high milage oils. [Re: tblt44] #5442158 05/29/20 10:17 PM
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dogememe Offline
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A leak is a leak but if it leaks less with the Maxlife stick with that...


2010 Ford Escape 2.5 ~104K Miles: AMSOIL Signature Series 0W-30, Wix Filter.
2001 Chevy Suburban 5.3 ~293K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: General thoughts on high milage oils. [Re: tblt44] #5442175 05/29/20 11:18 PM
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HyundaiAbuser Offline
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I've used edge high milage 40 weight in my tiburon and when i went to a 5w30 i burned a quart over the oil change that i hadn't noticed beforehand. Whether that is up to oil weight or additives I couldn't tell you. I can certainly tell you that Valvoline Maxlife semi syn slowed burning and leaking in my b4000.


03 Hyundai Tiburon:
PP High Mileage 5w30
Redline MT85
94 Mazda B4000 (RIP)
Supertech 10w40 High Mileage
Valvoline Maxlife
Re: General thoughts on high milage oils. [Re: tblt44] #5442186 05/29/20 11:50 PM
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LotI Offline
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An oil can only do so much to fix a mechanical defect. Check the PCV system as you may have too much pressure.


03 Honda Interceptor
11 Kawasaki KLR 650
12 Ford E450
19 Buick Regal TourX
Re: General thoughts on high milage oils. [Re: tblt44] #5442214 05/30/20 03:05 AM
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dubber09 Offline
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With very small gasket or seal leak you may be able to cure it with HM oil.
Mobil 1 HM oil did the trick for me while ST HM and Valvoline HM didn't close the leak.


Kia Sportage 2014 GDI 2.4L
Kia Forte 2014 MPI 1.8L
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