sergeant76
New Bedford, MA
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What is the general consensus on SuperTech 15W-40 oil used for Diesel & Gasoline recommended for Fleet and Farm requirements?
Any Pro's or Con's regarding this oil to be used in the Onan Generator of our 2010 RoadTrek 190P?
I do know that Onan ships out the Generator's with 15W-40 oil, which brand I do not know.
SuperTech Oil is a Wal-Mart brand.
Ron
Ron & Rose Cabral
Snoopy-Peanut-Daisy
New Bedford, MA
2010 Chevy/RoadTrek190 Popular
FMCA: 303873-02 ~K1RRC~ E-mail: RRCRT@aol.com
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dreed
Mtm. View,Ca.
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The Owan manual I have recommends single wt 30 if the temperatures encountered are always above 32 deg.
Dave 04 P/W TD.
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retraite
Wanderin' about
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Joined: 04/08/2005
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Here is Onan's "spec". See the top of page 6.
For an air cooled engine, I don't subscribe to the 150 hour interval. I change mine much more frequently. It's only one quart.
Cheers.
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topless
Wichita, KS
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I called Onan a couple of years ago and found out they didn't have a problem with 5w30 oil, so I used 5w30 synthetic in mine. My Onan is a propane unit and the oil still looks like new after 2 years and about 20 hours.
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radio man 7.262
terre haute in u.s.a.
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Super-tech is a good quality oil. I purchased a new ONAN gen a few yrs ago and the tag on it said to use Shell rotella 15w40 oil, i tried it and it was ok but i preffer 30w oil in all my air cooled engines. BOB 
Bob and Jane
2006 Gulf Stream Vista Cruiser Sprinter
(name of sprinter "OMEGA", means the last one )
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4*phun*2
Canada
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Some say oil is oil.
I use synthetic oil in very engine I own.
Glenn & Karen
'08 Chevy LT 3500 HD 4x4 CC LB DRW (nice hips)
'06 F350 4X4 Lariat CC LB DRW (nice hips) retired
'09 Victory Lane 38SRV Toy Hauler
'02 HD Road King FLHRCI KRUZN
'04 F150 XLT Super Crew
Our Toys
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ronsminis
Newport News, VA, USA
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Mobil 1 in everything - unless it is old, worn out or leaks.
Cheap insurance and the oil does not break down due to high temperatures until it exceeds 500 deg. F.
Best regards,
Ron and Pat
2004 RT Popular 190
Newport News, VA
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1775
NY
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15W-40 is Onan's recommended oil for Microlite 2.8 generators used in climates that range from 10 to 100 degrees F. Ron is in the North East and that is just about the climate range (up and down some) so 15W-40 is what Onan is saying to use.
Roadtrek 190 Popular 2011
Meryl and Me Hit the Road
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Atlee
Mechanicsville, VA
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1775 wrote:15W-40 is Onan's recommended oil for Microlite 2.8 generators used in climates that range from 10 to 100 degrees F. Ron is in the North East and that is just about the climate range (up and down some) so 15W-40 is what Onan is saying to use.
Of course that's assuming the generator will be used in below 32F.
Once I put 15W-30 in mine, but now I just use SuperTech 30W. It's a rare day when I will be using the genny in freezing temperatures.
And I also change it every late winter/early spring when the weather permits.
Erroll, Mary, Duffy the Badger Dog plus "Ollie"
2009 HiLo Towlite 2209T
2005 F150 Supercab 4x4, w/ 5.4L
1996 RoadTrek 210 Popular, on 1995 Chevy Chassis
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sergeant76
New Bedford, MA
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I just changed the oil in my Onan this morning, the oil appeared to be dirty, and it was only approximately 3/4's full, did it in my garage, the floor is level. I did run the Onan for a good 10 minutes prior to changing the oil.
I have a oil container that I drained the oil into it, then I poured it into the empty oil container of the oil I put into the Onan.
Had the oil changed in late February at a local Chevrolet dealer, I am beginning to think they did not change it, and I paid for it.
I did not use the Generator that much, but wondering if a quart was put in, would the Onan use up a quarter of the quart of oil, maybe.
Used the Castrol GTX SAE 10W-30 oil as I had it on hand, would like to try the SuperTeck 15W-40 oil next time, the price is $2.47 at WalMart, find that very cheap compared to the Castrol oil.
I was debating of mixing a small amount of Sea-Foam with the oil, thought best not to.
Ron
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