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#4655720 - 02/04/18 10:34 AM Help me pick a generator oil
HawkeyeScott Offline


Registered: 01/11/07
Posts: 785
Loc: El Oeste
Was meandering at Home Depot a few months ago and found a $600 Ryobi generator/inverter marked down to $300. It apparently had some issue, was returned, sent off for repair, sent back to the store and then marked way down. I bought it after making sure the 3 year warranty still applied.

It has a digital display which shows 12 hours on the unit. I will change the unknown oil thatís in it before taking it out boondocking this spring/summer. The manual calls for 10W-30. Itíll be used in temps ranging from 30 to 100, usually with pretty light loads.

In my stash, I have: Chevron Supreme 10W-30, Mobil 1 High Mileage 10W-40, SuperTech 15W-40 and Napa Synthetic 5W-30. Iím leaning towards the M1 or SuperTech.

What would you use?

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#4655731 - 02/04/18 10:42 AM Re: Help me pick a generator oil [Re: HawkeyeScott]
mrsilv04 Offline


Registered: 12/08/06
Posts: 8267
Loc: Illinois
What would I use? Rotella 10w-30.
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#4655735 - 02/04/18 10:44 AM Re: Help me pick a generator oil [Re: HawkeyeScott]
FlyNavyP3 Offline


Registered: 07/04/16
Posts: 1407
Loc: Jacksonville, FL
Out of the oils listed I'd personally run the Super Tech 15w40, its thin enough for easy starting in cold weather and thicker than the 30 spec requires if you need to run it when it's 100 outside not to mention the CJ-4 spec oil has more capacity to fight oxidative thickening soot loading from blow by on a carburetor equipped engine and as an added bonus has elevated levels of Phosphorus and Zinc as well as a healthy dose of Boron. It's really a fantastic sleeper oil at a fraction of the price of the M1 10w40 HM.
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#4655737 - 02/04/18 10:45 AM Re: Help me pick a generator oil [Re: HawkeyeScott]
CT8 Offline


Registered: 10/09/14
Posts: 10946
Loc: Idaho
Pick one and use it then keep an eye on the oil level, Then change it often.
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#4655761 - 02/04/18 11:05 AM Re: Help me pick a generator oil [Re: HawkeyeScott]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
What kind of engine is on it? I'd do the M1.


Edited by Alex_V (02/04/18 11:06 AM)
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#4655771 - 02/04/18 11:11 AM Re: Help me pick a generator oil [Re: HawkeyeScott]
toneydoc Offline


Registered: 12/16/11
Posts: 1693
Loc: War Eagle
Mobil 1 that you have will work well up to the hot temps you are talking about
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#4655772 - 02/04/18 11:12 AM Re: Help me pick a generator oil [Re: HawkeyeScott]
BigCahuna Offline


Registered: 09/29/09
Posts: 2140
Loc: Deep in the heart of Jersey
If the mfgr says to change the oil every 5 or 6 hours of use, I'd go with the one that will last the longest. I use mobil 1 EP. and run it at least twice what the oci is.,,

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#4655783 - 02/04/18 11:19 AM Re: Help me pick a generator oil [Re: BigCahuna]
HangFire Offline


Registered: 08/21/13
Posts: 2506
Loc: Central Maryland
Originally Posted By: BigCahuna
If the mfgr says to change the oil every 5 or 6 hours of use, I'd go with the one that will last the longest. I use mobil 1 EP. and run it at least twice what the oci is.,,


5-6 hours? That'd be awful in a days-long emergency. Even doubling that would be a pain in the neck for a day long outage. Mine says every 24 hours. That is manageable.

I would run a full synthetic in areas with high seasonal temperature variation, and straight 30W wherever it's always hot. And just about anything in on ongoing emergency, as long as it's always full, and some of it gets changed out every day.
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#4655805 - 02/04/18 11:31 AM Re: Help me pick a generator oil [Re: HawkeyeScott]
tig1 Offline


Registered: 01/03/09
Posts: 13657
Loc: Illinois
M1 10-30 has been my go to oil for OPE for many years, including my PowerMate 5KW gen.
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2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4655874 - 02/04/18 12:29 PM Re: Help me pick a generator oil [Re: HawkeyeScott]
NibbanaBanana Offline


Registered: 05/23/16
Posts: 292
Loc: New England
If the manual specifically says 10w-30, then why would you use anything else?

My vote is for M1 10w-30. They have it in stock at WalMart.
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1993 Ford E350 5.8L, 68K
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7500 OCI, M1 5-30 winter, M1 10-30 summer

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#4655961 - 02/04/18 01:56 PM Re: Help me pick a generator oil [Re: HawkeyeScott]
JimPghPA Offline


Registered: 08/22/09
Posts: 3859
Loc: Pittsburgh,PA U.S.A.
With non inverter generators that run at 3600 RPM constantly OCI of 24 hours sounds right. With inverter generators that throttle back the RPMs with light load, OCI of once every 50 hours should be dooable. But be sure to check the oil level and top it off if necessary every time you refill the gas tank.


Edited by JimPghPA (02/04/18 01:57 PM)
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#4655968 - 02/04/18 01:59 PM Re: Help me pick a generator oil [Re: HawkeyeScott]
JimPghPA Offline


Registered: 08/22/09
Posts: 3859
Loc: Pittsburgh,PA U.S.A.
Mobil 15W-50 would be the ideal oil for ambient temperatures of 30 to 100 F.
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#4655985 - 02/04/18 02:11 PM Re: Help me pick a generator oil [Re: HawkeyeScott]
Camprunner Offline


Registered: 02/19/08
Posts: 1034
Loc: MA.
Chevron Delo XLE 10w30 at WM it's a strong 10W30 that was designed to take a beating.

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#4656058 - 02/04/18 03:26 PM Re: Help me pick a generator oil [Re: HawkeyeScott]
HawkeyeScott Offline


Registered: 01/11/07
Posts: 785
Loc: El Oeste
Thanks for the insights, everyone.

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#4656069 - 02/04/18 03:37 PM Re: Help me pick a generator oil [Re: HawkeyeScott]
Eddie Offline


Registered: 12/07/03
Posts: 9559
Loc: Florida, Cape Coral
ROTELLA T5 10W30 IS MY CHOICE.
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