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Old 03-03-2014, 06:34 PM   #1
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What type of oil used for an Onan 2014

I have a 2014 Sunseeker and was wondering what type of oil most of you are using. In the maunal it says any 30 wt. would be ok but just want to see what most of you guys are using. Thanks afor all the good advice.
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Old 03-03-2014, 06:42 PM   #2
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I have been using Castrol 10w-30. I am a firm believer in Castrol products. Been using them for the past 40 years.
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Old 03-03-2014, 08:47 PM   #3
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Amsoil Syn.

10w30 Amsoil Synthetic
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Old 03-03-2014, 10:05 PM   #4
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Quote:
Originally Posted by Bednarski1
I have a 2014 Sunseeker and was wondering what type of oil most of you are using. In the maunal it says any 30 wt. would be ok but just want to see what most of you guys are using. Thanks afor all the good advice.
Its still under warranty, suggest follow Onan directive straight 30 weight.
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Old 03-04-2014, 05:47 AM   #5
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My Onan manual gives a range of temps and suggested weights of oil. Also, there was a yellow tag attached to the cover that said it was filled with 10w-40. When I change the oil in a couple of weeks (if the weather ever breaks), it will be Mobil 1 full synthetic 10w-40.
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Old 03-06-2014, 01:05 PM   #6
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Yeah, I don't know where the straight 30 wt is coming from... Maybe it's something new Onan is doing.

I fill mine with Mobil Delvac 15w40 (diesel engine oil). Buy the 1 gallon (4 quart) size. I run the same in my John Deere lawn tractor (air-cooled gas engine). I swear this is what (at the time) both manufacturers recommended for these air-cooled engines.
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Old 03-08-2014, 01:26 PM   #7
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Just checked my manual for the Onan 4000 QG (KY). It states that straight 30 is preferred when temps never dip below 32. It also gives temp ranges for other viscosity's. I have 15w-40 in mine because it was shipped that way and the temp range of 10 to 100F best fits my climate.

Also has,

10w-30 and 10W-40 for 0 to 80F
5W-30 for -20 to 50F

1.6 quarts
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Old 03-09-2014, 04:45 PM   #8
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We have 2013 2860 and as Mike and Molly..Amsoil. In fact the entire RV has Amsoil. Been using it since 1980 in all our vehicles.
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Old 03-09-2014, 05:30 PM   #9
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I have owned both diesel pusher and gas motorhomes and my rule of thumb was to run in the generator the same oil that I ran in the coach drivetrain.

This way you only need to carry one extra oil weight spare container with you and don't have any worries of pouring the wrong oil into the incorrect engine.

This is known as the KISS Principal (keep it simple stupid).
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