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#4647118 - 01/26/18 02:57 PM Mobil 1 once a year oil change
dbvettez061 Offline


Registered: 08/21/08
Posts: 141
Loc: 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 🥃
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#4647121 - 01/26/18 02:59 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
ARB1977 Offline


Registered: 06/12/05
Posts: 5191
Loc: North Texas
Depends on mileage
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#4647126 - 01/26/18 03:02 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
Richie Offline


Registered: 06/10/04
Posts: 300
Loc: 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.

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#4647132 - 01/26/18 03:11 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
CharlieBauer Offline


Registered: 03/29/16
Posts: 1184
Loc: 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.
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#4647133 - 01/26/18 03:11 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
SR5 Online   content


Registered: 07/07/15
Posts: 4530
Loc: 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.
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#4647135 - 01/26/18 03:13 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1911
Loc: 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.


Edited by Snagglefoot (01/26/18 03:25 PM)

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#4647138 - 01/26/18 03:18 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
ZZman Offline


Registered: 03/17/08
Posts: 5850
Loc: 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.
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#4647142 - 01/26/18 03:26 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
farrarfan1 Offline


Registered: 06/24/04
Posts: 1551
Loc: 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.
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#4647143 - 01/26/18 03:27 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
Cressida Offline


Registered: 10/16/02
Posts: 479
Loc: 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.

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#4647144 - 01/26/18 03:27 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35976
Loc: Great Lakes
Originally Posted By: dbvettez061
but would never leave it in for a year.

Why not?
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#4647154 - 01/26/18 03:36 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
CELICA_XX Offline


Registered: 11/28/08
Posts: 861
Loc: 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.
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#4647157 - 01/26/18 03:36 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
spj Offline


Registered: 10/14/17
Posts: 67
Loc: north east
Did it for 15 years on a 2001 gmc pick up truck. Traded it with 99,000.

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#4647161 - 01/26/18 03:42 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1911
Loc: SE British Columbia, Canada
Think of what this can do to the Quick Change business. SELL!!!

SF

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#4647164 - 01/26/18 03:48 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2910
Loc: 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.
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#4647198 - 01/26/18 04:19 PM Re: Mobil 1 once a year oil change [Re: dbvettez061]
mbacfp Offline


Registered: 09/02/15
Posts: 858
Loc: 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.


Edited by mbacfp (01/26/18 04:23 PM)
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