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Mobil 1 once a year oil change #4647118
01/26/18 02:57 PM
01/26/18 02:57 PM
Joined: Aug 2008
Posts: 146
western Colorado
dbvettez061 Offline OP
dbvettez061  Offline OP
Joined: Aug 2008
Posts: 146
western Colorado
This really makes me wonder. I use Mobil 1 on all my vehicles, but would never leave it in for a year. Your thoughts are appreciated 🥃


2001 Z06 Forged Blown Stroked 650 RWHP 645 RWTQ
Vietnam Vet 5thSFGA
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647121
01/26/18 02:59 PM
01/26/18 02:59 PM
Joined: Jun 2005
Posts: 5,296
North Texas
ARB1977 Offline
ARB1977  Offline
Joined: Jun 2005
Posts: 5,296
North Texas
Depends on mileage


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647126
01/26/18 03:02 PM
01/26/18 03:02 PM
Joined: Jun 2004
Posts: 307
Valencia, CA
Richie Offline
Richie  Offline
Joined: Jun 2004
Posts: 307
Valencia, CA
I've left the regular Mobil 1 synthetic in for a year and only replaced because of time. I only had 2600 miles on that oil.

Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647132
01/26/18 03:11 PM
01/26/18 03:11 PM
Joined: Mar 2016
Posts: 1,255
CA
CharlieBauer Offline
CharlieBauer  Offline
Joined: Mar 2016
Posts: 1,255
CA
I go up to around 18 months on my cars using full synthetics.

I've done UOAs and keep track of hours of operation which is more pertinent to my driving pattern than miles driven. If I went with time, I'd be changing at 6 months or a year depending on vehicle. If I went with mileage, I'd be running the oil even longer. Instead, I'm aiming for TBN to be around 3 which for me is best estimated using hours of operation.

1 year is not the limiting factor for the oil. It's how the vehicle is operated. Lots of very cold starts and short trips without any longer trips will be very very tough on oil. Oil is unlikely to last a year. Every trip being on the highway for an hour at 65mph will probably let you run M1 to it's stated mileage with room to spare. Do that exclusively once a week or month, and your oil could last for years.


It ain't what you don't know that gets you into trouble. It's what you know for sure that ain't so.

- mistakenly attributed to Mark Twain
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647133
01/26/18 03:11 PM
01/26/18 03:11 PM
Joined: Jul 2015
Posts: 4,658
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,658
Down Under
My owners manual says to change the oil every 15,000 KM (9,300 miles) or 12 months, whichever comes first.

Makes sense to me.


---------------------------------------------------------------------------------
Castrol GTX Ultraclean 15W40 A3/B3 + Wesfil-Cooper Z154
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647135
01/26/18 03:13 PM
01/26/18 03:13 PM
Joined: Dec 2017
Posts: 3,398
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 3,398
SE British Columbia, Canada
Definitely a step out, but they know few people will go the full 20,000 miles ( the bottle says 1 year or 20,000 miles, whichever comes first.) I would not worry about the one year part. The oil isnít evaporating.

They know darn well, if you are driving 20,000 miles in one year, you must be driving highway miles, which are easier.
Some big truck diesels are going 50,000 miles between changes. Yes the diesels lubricate but that is why gas engines are allowed 20 Instead of 50,000 miles. A UOA after 20,000 miles would tell the story.

Last edited by Snagglefoot; 01/26/18 03:25 PM.

If you want the job done right......do it yourself.
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647138
01/26/18 03:18 PM
01/26/18 03:18 PM
Joined: Mar 2008
Posts: 6,178
Michigan
ZZman Offline
ZZman  Offline
Joined: Mar 2008
Posts: 6,178
Michigan
Originally Posted By: dbvettez061
This really makes me wonder. I use Mobil 1 on all my vehicles, but would never leave it in for a year. Your thoughts are appreciated 🥃


Why do you say that. Need more info.


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: Mobil 1 once a year oil change [Re: dbvettez061] #4647142
01/26/18 03:26 PM
01/26/18 03:26 PM
Joined: Jun 2004
Posts: 1,554
Indiana
farrarfan1 Offline
farrarfan1  Offline
Joined: Jun 2004
Posts: 1,554
Indiana
Never quite understood the reasoning behind changing it after one year, it's not like the oil suddenly turns bad on day 365 or 366.


If laughter is the best medicine, then why do sick people go to doctors instead of comedians?
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647143
01/26/18 03:27 PM
01/26/18 03:27 PM
Joined: Oct 2002
Posts: 506
Joplin
Cressida Offline
Cressida  Offline
Joined: Oct 2002
Posts: 506
Joplin
I last changed the oil in October 2015 and plan on changing it again later this summer.

I don't really want to push it past 3 years.

Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647144
01/26/18 03:27 PM
01/26/18 03:27 PM
Joined: Oct 2002
Posts: 36,772
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline
Joined: Oct 2002
Posts: 36,772
Great Lakes
Originally Posted By: dbvettez061
but would never leave it in for a year.

Why not?


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
'18 Charger SRT (PUP 0W-40 SRT)
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647154
01/26/18 03:36 PM
01/26/18 03:36 PM
Joined: Nov 2008
Posts: 918
Oklahoma
CELICA_XX Offline
CELICA_XX  Offline
Joined: Nov 2008
Posts: 918
Oklahoma
I am running M1 0w-40 in a vehicle that sees about 1,000 miles per year.

One year is easy. I will change at the 2-3 year mark with a Fram Ultra.


15 Toyota Prius - M1 EP 0w20 SN+
02 Toyota ECHO - Valv MaxLife Full Syn 5w30 SN+
97 Lexus LX450 - M1 EP HM 5w30 SN+
93 Lexus LS400 - Valv MaxLife Full Syn 5w30
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647157
01/26/18 03:36 PM
01/26/18 03:36 PM
Joined: Oct 2017
Posts: 76
north east
spj Offline
spj  Offline
Joined: Oct 2017
Posts: 76
north east
Did it for 15 years on a 2001 gmc pick up truck. Traded it with 99,000.

Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647161
01/26/18 03:42 PM
01/26/18 03:42 PM
Joined: Dec 2017
Posts: 3,398
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 3,398
SE British Columbia, Canada
Think of what this can do to the Quick Change business. SELL!!!

SF


If you want the job done right......do it yourself.
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647164
01/26/18 03:48 PM
01/26/18 03:48 PM
Joined: Oct 2009
Posts: 3,697
Wet side WA
JohnnyJohnson Online content
JohnnyJohnson  Online Content
Joined: Oct 2009
Posts: 3,697
Wet side WA
Originally Posted By: dbvettez061
This really makes me wonder. I use Mobil 1 on all my vehicles, but would never leave it in for a year. Your thoughts are appreciated 🥃


Depends a lot on how many miles you drive them a year.


2004 Corolla 128318
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74615
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73705 4-22-18
Re: Mobil 1 once a year oil change [Re: dbvettez061] #4647198
01/26/18 04:19 PM
01/26/18 04:19 PM
Joined: Sep 2015
Posts: 904
California
mbacfp Offline
mbacfp  Offline
Joined: Sep 2015
Posts: 904
California
Toyota Sienna = 1 year or 10,000 miles.

CX9 = 6 months or 7,500...but my drive has changed and I do 7,500 or 1 year. UOAs show time isn't that big of a variable...more mileage, fuel dilution, etc. Do 9 months and do a UOA to prove a year is doable in your application.

Last edited by mbacfp; 01/26/18 04:23 PM.

2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
2018 Dodge Charger SRT Hellcat
2012 Toyota Sienna LTD 3.5L V6
2003 Dodge Durango R/T 4x4 5.9L V8
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