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Which High Mileage Syn in 5w-30? #4596689
12/06/17 11:41 PM
12/06/17 11:41 PM
Joined: Sep 2011
Posts: 423
IL
lukejo Offline OP
lukejo  Offline OP
Joined: Sep 2011
Posts: 423
IL
I have a 2009 Silverado 2500HD with 6.0 gas engine. 94k miles. Does NOT use oil. Does NOT leak.
I plan to drive this to 300k at least.
Unlike all of our toyotas, every Ford or Chevy I've owned past 150k has had some degree of oil leaks...including rear mains in the trucks. While HM oils helped these leaks to varying degrees, I never cured one.
So.....I'm considering switching the 2500 to HM now. Because HM formulas "help" seals, I'd rather do it as a preventative instead of a post-leak treatment.
Considering that, which of the HM full syns in the current 5w30 versions would you use?
1) I want to stay full syn. (Currently running Amsoil SS)
2) I want to stay 5w-30.
3) I do tow often in the warmer seasons.
Other---I was surprised to see that the Dexos Valvoline FSwML has a higher Noack of 12.2 as well as worse pour point than M1HM and PPHM. I also see PPHM pour point is considerably lower than M1HM, but flash point is not nearly as good...maybe just because it's on the thinner end of viscosity?

Re: Which High Mileage Syn in 5w-30? [Re: lukejo] #4596695
12/06/17 11:56 PM
12/06/17 11:56 PM
Joined: Dec 2016
Posts: 7,174
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,174
Waco, TX
Originally Posted By: lukejo
2009 Silverado - 94k miles. Does NOT use oil. Does NOT leak., every Ford or Chevy I've owned past 150k has had some degree of oil leaks...including rear mains in the trucks.


I think it has a lot to do with modern CNC machine practices and VERY strict QC controls in modern engine factories.

I know of a TON of vehicles from many different makes (Chevy and Ford not excluded) with well over 200,000 miles and do not burn oil, nor do they leak oil.

When you tell someone you have 94K miles and they reply "Hey, she's just getting broke in!"..... they aren't kidding.


"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: Which High Mileage Syn in 5w-30? [Re: lukejo] #4596696
12/06/17 11:58 PM
12/06/17 11:58 PM
Joined: Dec 2016
Posts: 7,174
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,174
Waco, TX
Oh - - - - having just said all that -
I currently have 8K on an OCI of Harvest King 5W-20 (Dexos 1 approved)
in my 2008 F150 with 155,000 miles and it doesn't burn or leak a drop.


"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: Which High Mileage Syn in 5w-30? [Re: lukejo] #4596700
12/07/17 12:03 AM
12/07/17 12:03 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
It depends on if your engine has the kind of seals that respond to HM oils.

Re: Which High Mileage Syn in 5w-30? [Re: lukejo] #4596770
12/07/17 05:14 AM
12/07/17 05:14 AM
Joined: Jan 2009
Posts: 2,473
wi
dave123 Offline
dave123  Offline
Joined: Jan 2009
Posts: 2,473
wi
If engine was run exclusively on Amsoil SS I see no need to change what so ever. If engine ran on this that and everything else pick one I do like M1 cost and performance heck Max Life probably good enough.

Re: Which High Mileage Syn in 5w-30? [Re: lukejo] #4596792
12/07/17 06:39 AM
12/07/17 06:39 AM
Joined: Mar 2008
Posts: 6,136
Michigan
ZZman Offline
ZZman  Offline
Joined: Mar 2008
Posts: 6,136
Michigan
Any of the big brands like PP HM, Mobil 1 HM or Castrol Edge HM. Go for best price.


2003 Mercury Grand Marquis. PP HM 5w-30 and Fram Ultra
2008 Sebring Hardtop convertible. PP HM 5w-30 and Fram Ultra
2006 Kawasaki Vulcan 900 LT. Motul 7100 10w-40 and K&N
Re: Which High Mileage Syn in 5w-30? [Re: lukejo] #4596911
12/07/17 08:56 AM
12/07/17 08:56 AM
Joined: Nov 2009
Posts: 2,417
Oconomowoc Wi
Boss302fan Offline
Boss302fan  Offline
Joined: Nov 2009
Posts: 2,417
Oconomowoc Wi
I have tried most of the HM oils and right now I am a fan of Valvoline full synthetic with Maxlife technology. It comes in different weights, so pick your flavor... I have used 0W20 and also the 5W30 weights and all my engines seem to run smooth, quiet and like they should.

Last edited by Boss302fan; 12/07/17 08:56 AM.

John P
Wisconsin
2018 Subaru Outback 3.6R Limited
2006 GS 430
2006 Lexus LS 430
1990 Jaguar XJS V12
2011 Hyundai Santa Fe V6
Other fun cars
Re: Which High Mileage Syn in 5w-30? [Re: Merkava_4] #4596929
12/07/17 09:09 AM
12/07/17 09:09 AM
Joined: Dec 2016
Posts: 7,174
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,174
Waco, TX
Bingo!
Winner chicken dinner....
Originally Posted By: Merkava_4
It depends on if your engine has the kind of seals that respond to HM oils.


https://bobistheoilguy.com/forums/ubbthreads.php/topics/4596926


"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: Which High Mileage Syn in 5w-30? [Re: lukejo] #4596997
12/07/17 10:11 AM
12/07/17 10:11 AM
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
My FIL has an '03 1500HD (6.0) he bought 2 1/2 years ago at auction with 230-something on it - none of the gauges work but his driving routine is regular enough that it can be calculated within a thousand or two miles a quarter and it figures out to a minimum of 30K a year. He drives 80 miles a day, 5-6 days a week, beats it around the farm, redlines it when he gets into a muddy patch in the field - makes me cringe. Since replacing the transmission and beginning this driving routine 2 years ago I've changed the oil 4 times with Maxlife red bottle 10w30 - Christmas and 4th of July-ish. Do the math. It has to be very close, if not slightly over, 300K now.

If you have as much concern for your truck's oil regimen as it seems you do, any FSHM will be the last thing that causes any failure in the 6.0.

Last edited by Alex_V; 12/07/17 10:13 AM.

To quote a friend, "Synthetics, man."

'85 GMC C3500, 454, 132K
'82 Mercedes 300CD, OM617 turbo, 173K (totaled 2018, in rehab)
'85 Mercedes 300TD, OM617 turbo, 217K (wife's)
'67 Suburban, 350, 331K
Re: Which High Mileage Syn in 5w-30? [Re: lukejo] #4597018
12/07/17 10:31 AM
12/07/17 10:31 AM
Joined: Oct 2014
Posts: 12,582
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,582
Idaho
0W-40 !


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Which High Mileage Syn in 5w-30? [Re: lukejo] #4598314
12/08/17 05:04 PM
12/08/17 05:04 PM
Joined: Jul 2010
Posts: 2,667
Dallas TX
MetalSlug Offline
MetalSlug  Offline
Joined: Jul 2010
Posts: 2,667
Dallas TX
Mobil 1 HM 5w30 always been my favorite. Its also cheap at walmart. that what I be running on my terminator since its getting up their now too.


NO FRAM OCOD " Orange Can Of DEATH �
03 SVT COBRA 10th anniversary Whipple 600whp M1 5w30 Wix 51372XP
01 Corvette ZO6 stock M1 5w30 / M1-107A
2016 NISSAN TITAN dealer OC daily drive

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