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Maxlife - still the best oil for R/M seal leaks? #4653297
02/01/18 04:48 PM
02/01/18 04:48 PM
Joined: Dec 2017
Posts: 50
Idaho
RonRonnster Offline OP
RonRonnster  Offline OP
Joined: Dec 2017
Posts: 50
Idaho
A friend of mine picked up a '94 GMC Suburban with the TBI 350. Weeps a little bit from the rear main seal. I suggested he try Valvoline Maxlife to see if that helps slow it down at all - also couldn't hurt with 184k miles on the engine. After reading some threads here, and on other sites, many people are commenting that Maxlife doesn't work as well as it used to. Of course, no real data to back that up, but it does appear that Valvoline changed it's formula to meet Dexos Gen 2 specs. Is there a "better" high mileage oil out there than Maxlife these days for rear main leaks? I have run FS Maxlife in my '98 Chevy, but it hasn't been a leaker to speak of.

Other high mileage options that are easily attainable at WalMart:

Mobil 1 High Mileage
Pennzoil High Mileage
Castrol GTX High Mileage
SuperTech High Mileage

Any experience or anecdotal evidence that any of these work better the another for seal leaks?


- 2007 GMC Yukon XL Denali - 6.2L / 81k mi.
- 1998 Chev K1500 4x4 - 5.7L / 155k mi.
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653308
02/01/18 04:57 PM
02/01/18 04:57 PM
Joined: Apr 2016
Posts: 846
KS
FordBroncoVWJeta Offline
FordBroncoVWJeta  Offline
Joined: Apr 2016
Posts: 846
KS
Originally Posted By: RonRonnster
A friend of mine picked up a '94 GMC Suburban with the TBI 350. Weeps a little bit from the rear main seal. I suggested he try Valvoline Maxlife to see if that helps slow it down at all - also couldn't hurt with 184k miles on the engine. After reading some threads here, and on other sites, many people are commenting that Maxlife doesn't work as well as it used to. Of course, no real data to back that up, but it does appear that Valvoline changed it's formula to meet Dexos Gen 2 specs. Is there a "better" high mileage oil out there than Maxlife these days for rear main leaks? I have run FS Maxlife in my '98 Chevy, but it hasn't been a leaker to speak of.

Other high mileage options that are easily attainable at WalMart:

Mobil 1 High Mileage
Pennzoil High Mileage
Castrol GTX High Mileage
SuperTech High Mileage

Any experience or anecdotal evidence that any of these work better the another for seal leaks?
I think the reason maxlife doesn't work like its use to because its now a semi synthetic. I started putting PHM in my sunfire, stopped leaking and cut down on burning.


17 Volkswagen Jetta 1.4T
15 Honda CRV 2.4
12 Volkswagen Jetta 2.0
01 Pontiac Sunfire 2.2
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653310
02/01/18 04:58 PM
02/01/18 04:58 PM
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
I've never had a rear main seal leak, so I cannot comment on any oils totally effectiveness at stopping that sort of leak.

Many here are very happy with maxlife. I'd say he try that first and see what happens.

I had some leaks on my 97 civic and 98 Sienna. I used liqui moly motor oil saver and had good results.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653337
02/01/18 05:30 PM
02/01/18 05:30 PM
Joined: Dec 2016
Posts: 2,170
VA
maverickfhs Offline
maverickfhs  Offline
Joined: Dec 2016
Posts: 2,170
VA
Subscribed...


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653341
02/01/18 05:38 PM
02/01/18 05:38 PM
Joined: Dec 2005
Posts: 85
Martha's Vineyard MA
SHOPete Offline
SHOPete  Offline
Joined: Dec 2005
Posts: 85
Martha's Vineyard MA
I was a skeptic on HM oils until I put PZHM in a leaky Ford Windstar V6. A miracle drug. Completely dried up a soaked motor. If I needed it, I'd use it again for sure. Can't comment on MaxLife.


17 Hyundai GLS QSUD 5w-30 OEM filter
09 Corvette LS3 M1 5w-30 M1-113A
01 Toyota Tundra 135K PZ Euro 0W-40 OEM filter
Re: Maxlife - still the best oil for R/M seal leaks? [Re: SHOPete] #4653358
02/01/18 05:55 PM
02/01/18 05:55 PM
Joined: Feb 2009
Posts: 1,578
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,578
wv
I do not endorse these products..just have seen the bottles.




Last edited by krismoriah72; 02/01/18 05:57 PM.
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653362
02/01/18 06:04 PM
02/01/18 06:04 PM
Joined: Jul 2013
Posts: 117
NC
lawrencerd Offline
lawrencerd  Offline
Joined: Jul 2013
Posts: 117
NC
I can honestly say Maxlife dried up a leak very well in my Jeep, since using QS HM it is a leaker again. Not a huge amount but that is one data point. Good luck with your friend's leak.

Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653369
02/01/18 06:14 PM
02/01/18 06:14 PM
Joined: Jun 2016
Posts: 3,003
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,003
MN
Valvoline MaxLife does not swell the seals, an important distinction. We know it doesn't swell the seals much because it passes seal-swell tests in SN, and dexos1 for the full syn Maxlife. Maxlife conditions the seals. Conditioning may stop a small leak, as the seals would get more flexible, yet for something old already leaking, I'd definitely put in something like krismoriah72's Bar's or Blue Devil. See above post.

Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653370
02/01/18 06:17 PM
02/01/18 06:17 PM
Joined: Aug 2008
Posts: 3,171
USA
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,171
USA
Every 'fix in a bottle' I've tried worked initially and then stopped working some time later.

Even AutoRX was able to temporarily stop a leaking RMS, but the leak returned on the next oil change.

ATP 205 slowed the leak, but didn't stop it.

High mileage oil temporarily stoped the leak, but it returned later.


I'd leave it or pony up the money or sweat equity to replace the entire seal.

Re: Maxlife - still the best oil for R/M seal leaks? [Re: krismoriah72] #4653374
02/01/18 06:32 PM
02/01/18 06:32 PM
Joined: Mar 2015
Posts: 10,825
In the shop
53' Stude Online content
53' Stude  Online Content
Joined: Mar 2015
Posts: 10,825
In the shop
Originally Posted By: krismoriah72
I do endorse these products..just have seen the bottles.





Fix d this for you smile

Last edited by car51; 02/01/18 06:32 PM.

09' Camry LE, 141,020 miles

PP 5w30 and TG 4967
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653393
02/01/18 07:01 PM
02/01/18 07:01 PM
Joined: Jun 2003
Posts: 17,376
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,376
Deplorable in apple valley, ca
Maxlife worked to stop the RMS leak my Jeep had. Smitty's Super-S Completely stopped the leaks and oil burning the wife's Tahoe had.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653398
02/01/18 07:06 PM
02/01/18 07:06 PM
Joined: Sep 2010
Posts: 7,012
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,012
Texas
Dripping or wicking (engine famous for later) Mobil 1 10w30 High Mileage is a tad thicker with having to go 40s

Re: Maxlife - still the best oil for R/M seal leaks? [Re: SHOPete] #4653414
02/01/18 07:29 PM
02/01/18 07:29 PM
Joined: Dec 2016
Posts: 6,263
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,263
Waco, TX
Originally Posted By: SHOPete
I was a skeptic on HM oils until I put PZ HM in a leaky Ford Windstar V6. A miracle drug. Completely dried up a soaked motor. If I needed it, I'd use it again for sure. Can't comment on MaxLife.


I concur, I think the Pennz and Qkr St oils are similar packages,
and the high mileage products work very well on leaky rear crankshaft seals.


"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: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653424
02/01/18 07:52 PM
02/01/18 07:52 PM
Joined: Sep 2009
Posts: 16,026
OH
fdcg27 Offline
fdcg27  Offline
Joined: Sep 2009
Posts: 16,026
OH
Maxlife red bottle would be my first choice although M1 HM seems to work as well. The main rap I have on Maxlife is that the newer formulations no longer have any moly content.
The Maxlife is cheaper OTS but the M1 will be cheaper AMIR if you wait a couple of months for one of their MIRs.


17 Forester 18K VME 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: Maxlife - still the best oil for R/M seal leaks? [Re: RonRonnster] #4653460
02/01/18 08:47 PM
02/01/18 08:47 PM
Joined: Jan 2008
Posts: 10,701
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,701
OH
Maxlife Red bottle and probably the 5w30 variant. Don't bother with M1 for this problem.

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