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#4507654 - 09/04/17 09:37 PM Mobil 1 20w-50 Question
CCI Offline


Registered: 07/15/09
Posts: 132
Loc: New Mexico USA
After a fresh build on a Shovelhead I ran about 50 miles with regular oil, changed it, another 500 with regular oil, changed it, and then put in the Mobil 1 20w-50 made for V-Twins. Ended up being a weird year, and only put 400 miles on that last oil change.

I remember decades ago with regular oil there was a recommendation to change it at least annually no matter how low the miles because of acid build up.

Would this apply to synthetic as well, or do you suppose the Mobil 1 is still OK?

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#4507674 - 09/04/17 10:00 PM Re: Mobil 1 20w-50 Question [Re: CCI]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
My guess is the concensus will be one year is not an issue with so few miles.
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#4507703 - 09/04/17 10:43 PM Re: Mobil 1 20w-50 Question [Re: CCI]
NormanBuntz Offline


Registered: 07/27/13
Posts: 2121
Loc: Outer Banks, NC
How does the oil know it's only a year old?
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#4507731 - 09/04/17 11:42 PM Re: Mobil 1 20w-50 Question [Re: NormanBuntz]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
Originally Posted By: NormanBuntz
How does the oil know it's only a year old?


Don't keep us in suspense...whats the punchline?
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#4507740 - 09/05/17 12:37 AM Re: Mobil 1 20w-50 Question [Re: CCI]
oldhp Offline


Registered: 06/28/12
Posts: 1621
Loc: USA
There was only 1 candle on the oil can. grin
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#4507764 - 09/05/17 05:01 AM Re: Mobil 1 20w-50 Question [Re: CCI]
DuckRyder Offline


Registered: 10/20/05
Posts: 4206
Loc: Atlanta
I’ve run it about 18months and it was still fine with more miles.

The official recommendation is still 1 year, but I wouldn’t dump 500 mile M1 V-Twin.
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#4507899 - 09/05/17 09:11 AM Re: Mobil 1 20w-50 Question [Re: CCI]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Having worked on so many Harleys, I'll tell you this:
The carburetor you are using affects oil life more than miles or date.
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4507942 - 09/05/17 09:53 AM Re: Mobil 1 20w-50 Question [Re: CCI]
bigt61 Offline


Registered: 02/12/13
Posts: 3117
Loc: Virginia
I went 5 years with M1 in my Suburban - no issues.

https://bobistheoilguy.com/forums/ubbthr...M1_#Post4190879
_________________________
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#4507964 - 09/05/17 10:25 AM Re: Mobil 1 20w-50 Question [Re: Linctex]
WyrTwister Offline


Registered: 01/13/13
Posts: 1503
Loc: Texas
Originally Posted By: Linctex
Having worked on so many Harleys, I'll tell you this:
The carburetor you are using affects oil life more than miles or date.


Fuel dilution ?

Best wishes , :-)
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#4508228 - 09/05/17 04:22 PM Re: Mobil 1 20w-50 Question [Re: CCI]
BigCahuna Offline


Registered: 09/29/09
Posts: 2140
Loc: Deep in the heart of Jersey
Blackstone's stand on oil is that usage effects oil not age. But if your dumping gas in the cyls, that's winding up in the oil, your oil will test out to be thinner then when you put it in. Down A grade or so doesn't seem to effect the motors much as far as UOA's go.,,,

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#4508288 - 09/05/17 05:45 PM Re: Mobil 1 20w-50 Question [Re: WyrTwister]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: WyrTwister
Originally Posted By: Linctex
Having worked on so many Harleys, I'll tell you this:
The carburetor you are using affects oil life more than miles or date.
Fuel dilution? Best wishes , :-)


You got it.
S&S are the WORST.

A Keihin CV on my Shovel got me 55-56 MPG.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4509364 - 09/06/17 06:44 PM Re: Mobil 1 20w-50 Question [Re: CCI]
benjy Offline


Registered: 08/23/10
Posts: 865
Loc: pa
most all of todays "synthetics" are regular oil kinda, group III highly processed CRUDE oil. after the law revision in 1999 most everyone went group III once the present stocks were sold. Mobil makes PAO, Ester + lower group oils as well, possibly a few years later changes were made with Amsoil being the latest though some group iV + V may be blended in some products. i am in that situation now with 3 motorcycles barely ridden this summer, they all have 15-50 silkolene said to br group III with ester, thinking another year may be ok as few very short rides are done, usually 30 to 90 90 minute runs!!

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#4509391 - 09/06/17 07:13 PM Re: Mobil 1 20w-50 Question [Re: benjy]
kschachn Offline


Registered: 12/26/05
Posts: 9380
Loc: Upper Midwest
Originally Posted By: benjy
most all of todays "synthetics" are regular oil kinda, group III highly processed CRUDE oil. after the law revision in 1999 most everyone went group III once the present stocks were sold. Mobil makes PAO, Ester + lower group oils as well, possibly a few years later changes were made with Amsoil being the latest though some group iV + V may be blended in some products. i am in that situation now with 3 motorcycles barely ridden this summer, they all have 15-50 silkolene said to br group III with ester, thinking another year may be ok as few very short rides are done, usually 30 to 90 90 minute runs!!

What law again was that which got changed in 1999? I keep asking but you never answer.
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#4509506 - 09/06/17 09:13 PM Re: Mobil 1 20w-50 Question [Re: kschachn]
blupupher Offline


Registered: 08/27/04
Posts: 4417
Loc: Katy, Republic of Texas
Originally Posted By: kschachn
Originally Posted By: benjy
most all of todays "synthetics" are regular oil kinda, group III highly processed CRUDE oil. after the law revision in 1999 most everyone went group III once the present stocks were sold. Mobil makes PAO, Ester + lower group oils as well, possibly a few years later changes were made with Amsoil being the latest though some group iV + V may be blended in some products. i am in that situation now with 3 motorcycles barely ridden this summer, they all have 15-50 silkolene said to br group III with ester, thinking another year may be ok as few very short rides are done, usually 30 to 90 90 minute runs!!

What law again was that which got changed in 1999? I keep asking but you never answer.


I am guessing they are referring to when the term "synthetic" was allowed to be applied to Grp III oils?
_________________________
1994 Honda VT1100C: Peak 15w-40/TG/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI


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#4509676 - 09/07/17 06:24 AM Re: Mobil 1 20w-50 Question [Re: CCI]
alarmguy Offline


Registered: 07/10/12
Posts: 2147
Loc: South Carolina
Originally Posted By: CCI
...

I remember decades ago with regular oil there was a recommendation to change it at least annually no matter how low the miles because of acid build up.

Would this apply to synthetic as well, or do you suppose the Mobil 1 is still OK?


Even today they recommend every year.

No doubt in my mind the Mobile synthetic oil is ok but for me personally, I would think I was doing better for my engine by buying $4.00 a quart Valvoline Motorcycle conventional oil and changing every year. I may be tempted to not change the filter if we are talking super low miles for the year.
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