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Generac portable generator oil? #4509176
09/06/17 03:31 PM
09/06/17 03:31 PM
Joined: May 2013
Posts: 36
FL
lawnman Offline OP
lawnman  Offline OP
Joined: May 2013
Posts: 36
FL
Ok my turn! Great advice on the honda generator earlier. Looking for recommendations on my brand new Generac. Portable unit. 8000 watts. Looks like they recommend 30 wt. Or 10/30 in lower temps. Here in Florida in summer means hot. Should have the machine up and running Friday and going to change factory fill at 5 hours. I was kinda thinking a multi grade 10/30 or 15/40 rotella. What ya think and wish us luck from irma!

Re: Generac portable generator oil? [Re: lawnman] #4509180
09/06/17 03:36 PM
09/06/17 03:36 PM
Joined: Jan 2008
Posts: 10,821
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,821
OH
Either 30 wt or 10w30. Probably the latter since a little easier to find. Stay safe down there man. Prayers are with you brother.

Re: Generac portable generator oil? [Re: lawnman] #4509183
09/06/17 03:39 PM
09/06/17 03:39 PM
Joined: Sep 2013
Posts: 10,534
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,534
Indiana
With the warranty, I'd use what the OM says. Does anyone still make a gas rated 30w HDEO?

M1 10w30 HM gets my vote here.. or some gas rated T5 if you can find it.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: Generac portable generator oil? [Re: lawnman] #4509189
09/06/17 03:47 PM
09/06/17 03:47 PM
Joined: Feb 2011
Posts: 6,725
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,725
Hudson, NH
Our service guy performs a yearly change with M1 10w30. Comes out so clean it seems like a waste. He said he uses 10w30 because its not so thick it robs power and hard to start. I'm sure you could use thicker or thinner if you wanted. Mine has a delay in ignition where the starter turns the engine over for approx 15 secs, enough to get oil on parts before it actually starts for its weekly auto test.


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Generac portable generator oil? [Re: lawnman] #4509193
09/06/17 03:48 PM
09/06/17 03:48 PM
Joined: Sep 2004
Posts: 7,611
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,611
Marshfield , MA
If the unit has an electric starter, I would use 15W40.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Generac portable generator oil? [Re: LeakySeals] #4509202
09/06/17 04:00 PM
09/06/17 04:00 PM
Joined: Jan 2008
Posts: 10,821
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,821
OH
Originally Posted By: LeakySeals
Comes out so clean it seems like a waste.


I know many that would use it in one of their cars like your Maxima.

Re: Generac portable generator oil? [Re: lawnman] #4509224
09/06/17 04:22 PM
09/06/17 04:22 PM
Joined: Jan 2009
Posts: 13,859
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,859
Illinois
A friend was a Gererac tech for several years. In the Generac school his instructors rec. M1 5-10-30. I use M1 10-30 in my Subaru powered 5 KW gen. It actually is hotter here in Illinois than Florida in the summer.

Last edited by tig1; 09/06/17 04:23 PM.

2007 Ford Fusion 232,000 miles
M1 0-20 EP
2017 Ford Fusion 58K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters

Re: Generac portable generator oil? [Re: lawnman] #4509234
09/06/17 04:33 PM
09/06/17 04:33 PM
Joined: Mar 2008
Posts: 5,873
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,873
South Florida
Former small engine tech here.

Do you remember the 2004 FL hurricane season? 4 storms back to back. Millions without power for 30-40 days. It was miserable.

And people were slap blowing up their free FEMA generators within DAYS!! (yes the govt bought you a generator, for free, if you asked for one)

You REALLY need to stay on top of the oil level. You have to check it AT EVERY FILL UP. You also need to change the oil every two days. Its a severe duty cycle, and these small engines will burn through oil at a very rapid pace, ESPECIALLY the conventional multi-weights.

After two days of continuous use, the oil gets really fuel diluted, thins some more, which causes consumption, and before you know it you are dangerously low or blowing up your engine.

30 weight oils are MARGINAL, in a generator, in Florida. Period. If you are the less than 10% of folks that will religiously check your oil level, and religiously change your oil every 2 days, then yes, 30 weight will be fine for you.

My standard recommendation for this scenario is 15W40 minimum. 20W50 also a very appropriate and excellent recommendation, contrary to what the northerns and Canadians on this board would tell you. SAE40 is also IDEAL. Autozone and Advance usually carry it in a store brand.

Just look at Briggs & Stratton oil recommendations for severe duty (your engine is made by Briggs and Stratton). They recommend 20W50 in severe duty applications, when for years they never did, only recommending 30 weight. Wonder why? Too many warranty claims and blown engines.

A thicker oil in this application gives you a lot more margin for error should you get lazy and not keep your oil level up.


Briggs oil chart


And from their website:
-For continuous-use, such as commercial lawn cutting or pressure washing, use Vanguard 15W-50 Oil (temperatures from 20°F to 130°F).



17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30


Re: Generac portable generator oil? [Re: bubbatime] #4509246
09/06/17 04:45 PM
09/06/17 04:45 PM
Joined: Dec 2016
Posts: 6,476
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,476
Waco, TX
Originally Posted By: bubbatime

My standard recommendation for this scenario is 15W-40 minimum.


Same here. I have over 20 pieces of air-cooled OPE, and run 15W-40 in all of it. Some gets worked so hard, the exhaust system is a nice red glow at night. Run 15W-40 and your engine will be protected.

Ehhh... I don't check the oil EVERY fill-up


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Generac portable generator oil? [Re: Linctex] #4509264
09/06/17 04:59 PM
09/06/17 04:59 PM
Joined: Sep 2013
Posts: 10,534
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,534
Indiana
Originally Posted By: Linctex
Ehhh... I don't check the oil EVERY fill-up


Go sit in timeout and think about what you just said.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: Generac portable generator oil? [Re: lawnman] #4509270
09/06/17 05:04 PM
09/06/17 05:04 PM
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
Panzerman Offline
Panzerman  Offline
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
I have to agree with using a thick oil like 20w50 or at least a HD oil like 15w40.
My son had my Honda industrial generator for Hurricane Mathew. It never used oil when we took it camping, running all night with 10w30 but when you start running them 24 hours for 5-7 days they use the oil. When I went to change it, it was tar black and had about 6 ounces of oil in it.
Apparently the low oil sensor wasn't working. So lesson learned, check oil, don't be surprised if it didn't use oil but now does running that many hours non- stop. Didn't lose the engine but probably didn't do it any favors.



2006 Dodge Ram 2500 Hemi 4x4
2016 Dodge Challenger Scat Pack
Re: Generac portable generator oil? [Re: lawnman] #4509292
09/06/17 05:21 PM
09/06/17 05:21 PM
Joined: Mar 2004
Posts: 20,833
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 20,833
Upstate NY
30 or 10W30.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Generac portable generator oil? [Re: Panzerman] #4509321
09/06/17 05:51 PM
09/06/17 05:51 PM
Joined: Jan 2009
Posts: 13,859
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,859
Illinois
Originally Posted By: Panzerman
I have to agree with using a thick oil like 20w50 or at least a HD oil like 15w40.
My son had my Honda industrial generator for Hurricane Mathew. It never used oil when we took it camping, running all night with 10w30 but when you start running them 24 hours for 5-7 days they use the oil. When I went to change it, it was tar black and had about 6 ounces of oil in it.
Apparently the low oil sensor wasn't working. So lesson learned, check oil, don't be surprised if it didn't use oil but now does running that many hours non- stop. Didn't lose the engine but probably didn't do it any favors.



What 10-30 did you use. Also when run for days on in, the oil level should be checked every 6-8 hours, and changed every 50 hrs. Never go 5-7 days. Poor maintenance.

Last edited by tig1; 09/06/17 05:54 PM.

2007 Ford Fusion 232,000 miles
M1 0-20 EP
2017 Ford Fusion 58K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters

Re: Generac portable generator oil? [Re: lawnman] #4509346
09/06/17 06:19 PM
09/06/17 06:19 PM
Joined: Jun 2013
Posts: 1,721
Virginia
mattwithcats Offline
mattwithcats  Offline
Joined: Jun 2013
Posts: 1,721
Virginia
Look in the "Product Rebates, Sales and Promotions" section.
https://bobistheoilguy.com/forums/ubbthreads.php/forums/33/1/Product_Rebates,_Sales_and_Pro

Any full synthetic 10W-30 will work.

I see -
O'Reilly Auto, Havoline DS,
Advanced Auto Parts, Quaker State Ultra Deluxe,
Rural King full Synthetic,
And a few jugs may still be around, the 2.5 gallons Shell Rotella T5,


2009 Smart Pure
Pennzoil Platinum Euro 0W-40, Purolator Synthetic PSL 14610, 45 mpg...
185/55R15 General HP tires, "H" speed rated, 44 psi (300 kpa)
Re: Generac portable generator oil? [Re: lawnman] #4509351
09/06/17 06:25 PM
09/06/17 06:25 PM
Joined: Jul 2013
Posts: 2,235
Outer Banks, NC
NormanBuntz Offline
NormanBuntz  Offline
Joined: Jul 2013
Posts: 2,235
Outer Banks, NC
I assume your Generac has a Generac engine. As an owner of the twin cylinder Generac GT-990 motor on a 16kw standby unit for the past 11 years, I can talk from my experience only. Nix on the 30w or any conventional multigrade. Mine calls for 5w-30 and I run QS Ultimate synthetic. I change mine at 25-30 hour intervals. The used oil always looks clean and clear, but the engines can be hard on oil, especially if run in a hot climate, as previous poster said. Just don't make the mistake of using a conventional oil.


2017 Honda Odyssey SE, 16K
2013 Honda Accord LX, 58K
2007 Honda Ridgeline RTS, 88K
2007 Infiniti M35, 107K
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