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Old 10-10-2012, 08:58 AM   #1
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Lube oil for a onan genset

The unit is a micro-quiet 4 KW with 40 hours on it. the operators manual suggests using 30 SAE, I called Campers
World to order parts and the tech said to use 15/40 instead. I was thinking to going to synthetic oil because the rings should be seated by now. The unit is a 2007. Any ideas.

Thanks,
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Old 10-10-2012, 09:09 AM   #2
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If its a diesel then I would recommend Shell Rotella 15w-40. $30/2.5gal @ TSC store in Michigan and its not a synthetic.

To the specifics, the answer on viscosity depends on what ambient operating temperature you plan to start/run the genny in. For the synthetic it has to do with how often you want to change the oil and the cost. The operators manual may have an additional chart that shows temp/viscosity ranges. Syn. may reduce your useage/hr on fuel.
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Old 10-10-2012, 09:38 AM   #3
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I would recommend:

1. Use a 15w-40 regular oil such as Shell Rotella and change yearly.
2. Change oil/air/fuel filters.
3. Run one of the following fuel conditioner/cleaners now per the ratio indicated on each respective product and every 6 months thereafter.
4. Don't let Camping World touch anything you own iffen you want it to continue working satifactorily. Do the work yourself or find another shop.
5. Use the generator perferably 100+ hrs yearly and you will have less problems with it; ie, run it and use the rv roof air as primary when hot and the dash air secondary when travelling. Non-use is not a good thing.

Chevron Techron Concentrate Plus Fuel System Cleaner, 20 oz, 6-pack: Automotive : Walmart.com (One of the best fuel conditioners/cleaners on the market. Used in Chevron Gas and Valero gas)

Sea Foam | Motor Treatment | General Content - Motor Treatment

http://www.lucasoil.com/products/dis...tid=2&loc=show
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Old 10-10-2012, 06:56 PM   #4
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The manual which you can down load says 32 degrees and higher sae 30, 10 degrees to 100 use 15w40 which is what I use on my 7.5 gen.
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