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Amsoil Signature Series 5W-30 #4609951
12/21/17 08:26 AM
12/21/17 08:26 AM
Joined: Jan 2016
Posts: 29
Ct,USA
Ian1982 Offline OP
Ian1982  Offline OP
Joined: Jan 2016
Posts: 29
Ct,USA
Good morning everyone. What's everyone opinion on running a OCI of 15,000 miles (severe duty) with a GM 5.3 on Amsoil SS 5W-30 ? Who has experience with product with long OCI's? Thank you in advance and happy holidays everyone to you and your family.

Re: Amsoil Signature Series 5W-30 [Re: Ian1982] #4609962
12/21/17 08:37 AM
12/21/17 08:37 AM
Joined: Jul 2005
Posts: 30,963
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,963
NY
I'd get a UOA. I wouldn't run it, or any other oil for that matter that long under severe service conditions relying solely on blind faith.


God Bless Our Troops

Re: Amsoil Signature Series 5W-30 [Re: Ian1982] #4609968
12/21/17 08:41 AM
12/21/17 08:41 AM
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
Considering my father-in-law has been running about a 15K OCI (part of which qualifies as "severe") in his '03 1500HD (6.0) for the last 2 years/70,000 mi. - on syn blend Maxlife - I'm gonna say if you rack up the 15K in less than a year and your driving regimen is anything more than that of a taxi, it shouldn't be a problem.

FWIW, his truck now has somewhere over 275K on it and runs very well. I've been in the passenger seat when he put the accelerator to the floor in low range on his gravel drive, with my 3-ton camper behind us, and I'm still in disbelief that it didn't break something.


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: Amsoil Signature Series 5W-30 [Re: Ian1982] #4609979
12/21/17 08:46 AM
12/21/17 08:46 AM
Joined: Jan 2009
Posts: 13,974
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,974
Illinois
I am sure the Ams 5-30 will handle 15K for the average driver in the 5.3 with no problems. UOA not was never done. I have a friend that did 15-25K with reg M1 in his 1999 Silverado 5.3. Sold it when the 3rd trans failed. Another friend did 15-17K in his Dodge van with 190K. Sold it for a car. No reason for UOAs. What do you consider severe duty?

Last edited by tig1; 12/21/17 08:48 AM.

2007 Ford Fusion 235,000 miles
M1 0-20 EP
2017 Ford Fusion 60K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and Valvoline LV
M1 10-30 in all OPE
MC filters

Re: Amsoil Signature Series 5W-30 [Re: tig1] #4609997
12/21/17 08:59 AM
12/21/17 08:59 AM
Joined: Jan 2016
Posts: 29
Ct,USA
Ian1982 Offline OP
Ian1982  Offline OP
Joined: Jan 2016
Posts: 29
Ct,USA
I let it idle in the morning maybe a little too much and my trip to work is about 20 min. Mostly stop and go with about a 5 mile highway cruise in the middle . I was going on the conservative side of the duty cycle of Amsoil 25,000 OCI for Signature series. I could never go that many miles. 15K would be a stretch.

Re: Amsoil Signature Series 5W-30 [Re: Ian1982] #4610005
12/21/17 09:08 AM
12/21/17 09:08 AM
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
How often does the engine see more than 3,500 RPM or continued (more than 1/2 mile) use at more than 70% load? If the answer is "not often", your described driving schedule may fall close to the description of "severe" use in the manual, but you aren't pushing the capabilities of the LS.


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: Amsoil Signature Series 5W-30 [Re: Ian1982] #4610063
12/21/17 10:09 AM
12/21/17 10:09 AM
Joined: Oct 2014
Posts: 12,557
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,557
Idaho
Amsoil will do the job. Most buy Amsoil because they beleive all the hype except that it lasts longer in service. Does your engine fuel dilute the oil? That maybe the only caution point.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Amsoil Signature Series 5W-30 [Re: Ian1982] #4610082
12/21/17 10:37 AM
12/21/17 10:37 AM
Joined: Aug 2004
Posts: 20,193
CA
The Critic Offline
The Critic  Offline
Joined: Aug 2004
Posts: 20,193
CA
What 5.3 are we talking about? The older 5.3s were bulletproof. The newer 5.3s with AFM are a bit problematic and are an entirely different beast.


2011 Toyota Prius - 178k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 133K - Mobil 1 EP HM 5W-30
Re: Amsoil Signature Series 5W-30 [Re: Alex_V] #4610096
12/21/17 10:48 AM
12/21/17 10:48 AM
Joined: Jan 2016
Posts: 29
Ct,USA
Ian1982 Offline OP
Ian1982  Offline OP
Joined: Jan 2016
Posts: 29
Ct,USA
I baby this thing. Hardly sees 3500 rpm lol

Re: Amsoil Signature Series 5W-30 [Re: The Critic] #4610097
12/21/17 10:49 AM
12/21/17 10:49 AM
Joined: Jan 2016
Posts: 29
Ct,USA
Ian1982 Offline OP
Ian1982  Offline OP
Joined: Jan 2016
Posts: 29
Ct,USA
It's a 2013 5.3

Re: Amsoil Signature Series 5W-30 [Re: CT8] #4610099
12/21/17 10:50 AM
12/21/17 10:50 AM
Joined: Jan 2016
Posts: 29
Ct,USA
Ian1982 Offline OP
Ian1982  Offline OP
Joined: Jan 2016
Posts: 29
Ct,USA
No,it doesn't dilute oil with fuel

Re: Amsoil Signature Series 5W-30 [Re: Ian1982] #4610101
12/21/17 10:51 AM
12/21/17 10:51 AM
Joined: Aug 2004
Posts: 20,193
CA
The Critic Offline
The Critic  Offline
Joined: Aug 2004
Posts: 20,193
CA
A 2013 with AFM and potential lifter issues will not be a good candidate for extended drains.


2011 Toyota Prius - 178k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 133K - Mobil 1 EP HM 5W-30
Re: Amsoil Signature Series 5W-30 [Re: Ian1982] #4610102
12/21/17 10:52 AM
12/21/17 10:52 AM
Joined: Nov 2017
Posts: 91
SC, USA
Bxnanaz Offline
Bxnanaz  Offline
Joined: Nov 2017
Posts: 91
SC, USA
^^ agreed. Gotta keep those lifters clean.

Re: Amsoil Signature Series 5W-30 [Re: The Critic] #4610109
12/21/17 11:03 AM
12/21/17 11:03 AM
Joined: Jan 2016
Posts: 29
Ct,USA
Ian1982 Offline OP
Ian1982  Offline OP
Joined: Jan 2016
Posts: 29
Ct,USA
So do u recommend changing oil before the OLM says so with a solid product?

Re: Amsoil Signature Series 5W-30 [Re: Ian1982] #4610129
12/21/17 11:27 AM
12/21/17 11:27 AM
Joined: Mar 2017
Posts: 6,478
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 6,478
...
Originally Posted By: Ian1982
I baby this thing. Hardly sees 3500 rpm lol




You don’t have to redline it but you should wind that thing up now and then. It’s actually healthy.


Cannot see signatures any longer so it doesn’t matter.
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