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How long should I stay the course with GTX HM #4448511
07/03/17 04:52 PM
07/03/17 04:52 PM
Joined: Mar 2017
Posts: 88
OK, USA
bradtech Offline OP
bradtech  Offline OP
Joined: Mar 2017
Posts: 88
OK, USA
On my 2nd OCI of Castrol GTX 10w30 HM. 1993 S10 2.8L just shy of 203,000. Truck has had a slow rear main seal leak for a while. Can't really tell it has slowed the dripping down much at all compared to non HM oil. I just changed out the valve cover gaskets two weeks ago. Trying to avoid RMS. Will leave a drip or two overnight if driven. I was thinking of giving Maxlife or Pennzoil HM a try if GTX HM didn't slow down/stop the dripping. Not sure how long I should stay the course. Truck isn't driven a lot so we are looking at two-three OCI a year. I used to run Pennzoil/Quaker State in it 90k-160k before I sold it off to a guy. I just bought the truck back and the old farmer told me he was running Rotella in it up 198k. I switched it over to Castrol GTX HM at 200k to see if it helped clean/condition seals. It worked well for my 04 Focus Zetec that had some consumption issues but no leaks. Long time lurker on here.

Last edited by bradtech; 07/03/17 04:53 PM.

17 Chevrolet Malibu 3k 5w30 AC Delco Full Syn
08 Hyundai Santa Fe 78k 5w20 GTX HM OEM Filter
93 Chevy S10 203k 10w30 GTX HM ACDELCO PF52E Filter
Re: How long should I stay the course with GTX HM [Re: bradtech] #4448544
07/03/17 05:20 PM
07/03/17 05:20 PM
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
Sounds like a good candidate for atp 205


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: How long should I stay the course with GTX HM [Re: bradtech] #4448735
07/03/17 08:06 PM
07/03/17 08:06 PM
Joined: Jul 2016
Posts: 1,482
Jacksonville, FL
FlyNavyP3 Offline
FlyNavyP3  Offline
Joined: Jul 2016
Posts: 1,482
Jacksonville, FL
Welcome!

I've personally had the best luck with Valvoline MaxLife in the red jug, it's helped with slow leaks like that before, other times it made no difference, in the vehicles that it made no difference nothing short of mechanical intervention helped. It's worth a shot as I can't see putting that much work into an older 200k S-10.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: How long should I stay the course with GTX HM [Re: bradtech] #4448817
07/03/17 09:10 PM
07/03/17 09:10 PM
Joined: Sep 2012
Posts: 1,981
Greatest Earth on Show, UT
NMBurb02 Offline
NMBurb02  Offline
Joined: Sep 2012
Posts: 1,981
Greatest Earth on Show, UT
The RMS on my Suburban wept when I first got it. GTX HM did the trick on the first fill. When I switched to MaxLife it got worse. By there's no harm in trying MaxLife if GTX isn't working for you.


2002 Chevy Suburban 1500, Rotella T6 5W-40, Fram TG3675
2006 Pontiac Grand Prix GT, G-Oil Syn 5W-30, Fram TG3387A
Re: How long should I stay the course with GTX HM [Re: bradtech] #4448914
07/03/17 11:08 PM
07/03/17 11:08 PM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
Originally Posted By: bradtech
On my 2nd OCI of Castrol GTX 10w30 HM. 1993 S10 2.8L just shy of 203,000. Truck has had a slow rear main seal leak for a while. Can't really tell it has slowed the dripping down much at all compared to non HM oil. I just changed out the valve cover gaskets two weeks ago. Trying to avoid RMS. Will leave a drip or two overnight if driven. I was thinking of giving Maxlife or Pennzoil HM a try if GTX HM didn't slow down/stop the dripping. Not sure how long I should stay the course. Truck isn't driven a lot so we are looking at two-three OCI a year. I used to run Pennzoil/Quaker State in it 90k-160k before I sold it off to a guy. I just bought the truck back and the old farmer told me he was running Rotella in it up 198k. I switched it over to Castrol GTX HM at 200k to see if it helped clean/condition seals. It worked well for my 04 Focus Zetec that had some consumption issues but no leaks. Long time lurker on here.


Try M1 HM 10w-30

It's a great oil and a very thick 30. Done a great job in my fusion


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: How long should I stay the course with GTX HM [Re: bradtech] #4449248
07/04/17 10:19 AM
07/04/17 10:19 AM
Joined: Jun 2011
Posts: 7,058
Mahzurrah!
KCJeep Offline
KCJeep  Offline
Joined: Jun 2011
Posts: 7,058
Mahzurrah!
That's good oil, if I was going to switch due to trying to stop a leak I'd go PHM first. JMO.


09 Lincoln MKZ AWD 97k - M1 AFE 0w30
12 KIA Sedona 91k - PP HM 10w30
09 Ford Focus 131k - Supertech FS HM 5w30
00 Chev Lumina 201k - Supertech FS HM 5w30
04 Jeep Grand Cherokee gone but not forgotten.
Re: How long should I stay the course with GTX HM [Re: bradtech] #4449272
07/04/17 10:39 AM
07/04/17 10:39 AM
Joined: Feb 2013
Posts: 3,117
Virginia
bigt61 Offline
bigt61  Offline
Joined: Feb 2013
Posts: 3,117
Virginia
I'd just stick w the GTX HM at this point. You have to add a lot of oil for a RMS repair to be worth it IMO. If you're doing enough top offs, just extend your OCI - you're constantly adding fresh oil.


92 Suburban 2500 7.4L 58k M1_0w40 5yr OCI
99 Olds Aurora 4.0L 91K M1_5w30 5yr OCI
13 Dodge Dart 2.0L 30k PP 0w20 OLM OCI
70 Camaro 5.7L 59k
Re: How long should I stay the course with GTX HM [Re: bradtech] #4456792
07/11/17 10:10 PM
07/11/17 10:10 PM
Joined: Mar 2017
Posts: 88
OK, USA
bradtech Offline OP
bradtech  Offline OP
Joined: Mar 2017
Posts: 88
OK, USA
Almost 1000 miles into this oil change. Checked and it is still full of oil. Seems to be a modest improvement from first OCI and the previous OCI with Rotella. Hoping for continued improvement even though I still see some drips.


17 Chevrolet Malibu 3k 5w30 AC Delco Full Syn
08 Hyundai Santa Fe 78k 5w20 GTX HM OEM Filter
93 Chevy S10 203k 10w30 GTX HM ACDELCO PF52E Filter

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