Question about Watts Onan Portable Generator - 4000 , Model# 5500

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Can i use synthetic oil in my new onan 6500 portable generator

What brands and types of oil do you recommend for use in 10 to 100 degree weather

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Johndeere 10w-30 in cooler weather and 5w30 in warmer weather. Any auto parts store has small engine oil. They may have a better idea when you go to purchase your oil for your particular climate.

Posted on Jan 10, 2009


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What type of oil is recommended

You did not share the year, make, or model of the mower, but there is a general rule of thumb here.
Unless you are living where there is cold weather (below 40 degrees) , a good oil is 30 HD weight. If you are using this in colder weather, you would switch to 20W HD oil.
Be sure to use a HD, do not use "non-detergent".
You may also use a 10W-30 in any weather.
God bless your efforts.

Feb 08, 2016 | Garden

1 Answer

What sort of oil does my harley rocker c take

You do not mention engine or primary or transmission. HD SYN3 can be used in any or all. I believe for the engine the best is Harley-Davidson 360 (20/50) in most operating temperatures I am operating in. If you know how HD tested, developed and otherwise came up with this oil it is quite impressive. You could use synthetic (SYN3) but I don't I just use the regular HD 360 motorcycle oil. You do need motorcycle oil because it has necessary, very beneficial additives that are not in automotive oils. Unless you are running in very hot outside temperatures I do not see the benefit to SYN3 but if one has money to throw around it is very good oil also. Thing is to change it always before it gets a chance to break down and or turn dirty. HD recommends changing the oil and filter at 5000 miles or 8000 km intervals and I would recommend that or sooner in very hot or dusty conditions. Using synthetic oil does not extend these mileages between changes. If you have been using one type of oil for an extended time it is usually not recommended to change to a different type i.e. HD 360 to SYN3 or vice versa. If you do not know what was used before pick a type now and stick with it. SYN3 is all 20W50. (The W stands for winter.) The oil has a viscosity of 20 cold and will not thin out more than a 50 weight would when it is hot.

Harley recommends HD 360 engine oil as follows:

H.D. Multi-Grade SAE 10W40 as excellent for cold weather starts below 50 degrees F and for use with lowest ambient temperature below 40 degrees F (4 degrees C).
H.D. Multi-Grade SAE 20W50 as good for cold weather starts below 50 degrees F and for use with lowest ambient temperature above 40 degrees F (4 degrees C).

H.D. Multi-Grade SAE 50 as poor for cold weather starts below 50 degrees F and for use with lowest ambient temperature above 60degrees F (16 degrees C).

H.D. Multi-Grade SAE 60 as poor for cold weather starts below 50 degrees F and for use with lowest ambient temperature above 80 degrees F (27 degrees C).

For transmission and/or primary use SYN3 or FORMULA+ TRANSMISSION AND PRIMARY CHAINCASE LUBRICANT (Part No. 99851-05, US quart size).

I won't deal with fork oil at all.

Whatever you do, NEVER use anything but DOT 4 Brake a DOT 4 system. Also be careful with it as it will eat away any and all painted surfaces and even the black powder coated brake fluid reservoir coatings.
If DOT 5 goes into a DOT4 system or DOT 4 goes into a DOT5 system all rubber brake system components will be destroyed.


Aug 23, 2014 | 2007 Harley Davidson FXST Softail Standard

1 Answer

Wondering what type of oil to use for winter between 5 - 7 degrees Celsius

The Virago uses 20W-50 oil in warm weather. If you ask any bike shop they will recommend moving to a 10W-40 in cold weather down to about 30ish F, and if you plan on riding down to extreme temps of about 20F and below, then a 5W-30 or 5W-40 is recommended. For the 5-7C temps you list, you could really just use the same oil you use for summer. Just take a little extra time in letting the bike warm up and don't ride it hard the first couple of miles to let the oil come up to full temp. If you prefer to err on the side of caution, then use the 10W-40 oil. I had a Yamaha 650 Classic and I used 20W-50 year round and never had issues as long as I made sure to warm it up properly first.

Nov 20, 2013 | 2005 Yamaha Virago 250

1 Answer

What oil to use for a 10 year Ford Focus 2003

Generally speaking, we do not make recommendations on products by brand. Any of the brands you mentioned will meet the factory specs.
If the car has over 100,000 miles, you could bump up the weight to 10w-30 or 10w-40. Or stay with the factory recommendation.
The low number is the weight of the oil at zero degrees, and the high number is the weight at 200 degrees.
Keeping the oil and filter changed is more important than the weight.

May 10, 2013 | 2003 Ford Focus

1 Answer

What kind oil goes in a 1997 dodge neon 3 speed automatic

  • Here are the factory specs.

  • If the temperature in your area is mostly above 0 degrees the a 10W-30 is recommended.
  • If your climate is below an average below 32 degrees then 5W-30 is recommended.

  • Basically if you live in an area that is frigid most of the time a 5W30 would be recommended. If the climate where you live is a little warmer than a 10W30 is recommended --- Conventional is what's in the book but a Semi Synthetic or full Synthetic will be fine to so long as you stick with one type of oil. The brand is up to you but I prefer Quaker State,

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Oct 11, 2011 | 1997 Dodge Neon

2 Answers

My 95 lancruiser is making a loud ticking noise when cold, it seems to diminish after driven for a bit - what can this be?

Motor oil thickens when cold- on very cold days, some grades of motor oil can be nearly the consistency of honey. It takes time for the oil to make its way from the oil pan to the top of your engine.

The ticking you hear is usually caused by the valve lifters running nearly "dry" - meaning that they are getting very little oil. As your Cruiser warms up, the oil thins and makes it "up top" much easier, so the noise decreases.

Make sure that you are following your manufacturers recommendation for the grade and viscosity of oil (example: SG SAE 10W30) for the temperatures you are operating your car in. In extreme cold weather environments, such as Chicago or Milwaukee, you may want to use an even "lighter" oil (example: 10W20 instead of 10W30) - you just have to be certain that when spring arrives, you go with the higher viscosity oil- your manufacturer normally covers this info. The grade (example: SG) is very important because it refers to the detergent content of your oil.

No vehicle manufacturer that I am aware of recommends a "straight grade" viscosity oil (example: SAE 30) in cold weather. Multi-grades, which act "lighter" in cold weather are called for.

The "W" in the oil viscosity designation means "winter" - it is the viscosity of that particular oil at 0 degrees F..... For example, "10W30" oil is as thick as an oil with a viscosity of 10 at 0 degrees F, and is as thick as an oil with a viscosity of 30 at 70 degrees F.

Pretty Cool, Huh?

It is not a good idea to use any oil thickening additive (STP, motor honey, etc...) in cold weather because they tend to add even more viscosity.

"The Court is out" regarding teflon additives such as "Slick 50" to your oil- the principle sounds good to me, and I have used them myself. Personally, a similar product has seemed to help tone down the "startup ticking" I myself have experienced.

Feb 05, 2011 | 1995 Toyota Land Cruiser

1 Answer

What type of oil do I use in an 06 S40 in 100 degree weather?

When temperatures exceed 86° F (30° C) in your area, Volvo recommends, for the protection of your engine, that you use a heavier weight oil, such as SAE 10W-30.

Jul 30, 2010 | 2001 Volvo S40

1 Answer

2005 yamaha royal star. what type and how much oil for the tranny?

The Royal Star crankcase lubricates engine, transmission and wet clutch at the same time, that's why frequent oil and filter changes are recommended. Use a high-quality multi-grade oil, 10W-30 in cold weather and 20W-40 in hot weather is recommended by the manufacturer. AVOID ANY OIL THAT SAYS ENERGY-CONSERVING (you'll see a seal on the bottle), that type of oil has a tendency to make the clutch slip. Personally, I recommend a multi-grade synthetic - I use Shell Rotella-T (T6) synthetic 5W-40 year-round, 111,000 miles since I changed from Mobil-1 0W-40 (9,000 on the Mobil-1) ; the engine's still tight, and the transmission and clutch are quiet.

Jun 09, 2010 | 2005 Yamaha Royal Star Tour Deluxe

3 Answers

Best oil to use in 2006 nissan maxima

Depending on the weather condtions where you live will determine the type of oil you should use. If you are in cold weather most manufactures for newer cars 2003 and up recommend 5-30 weight detergent oil. if it is hot you may want to go to 10-40 detergent. If you have the engine broken in say 30,000 miles I recommend my customers use 5-30 synthetic oil, it has better lubricating and heat removal qualities that regular motor oils don't have. also oil filters are important too. Iprefer fram oil filters, the heavy guard filters. they are more expensive but filter much finer particles. and last longer. So the better the oil and the better the filter the longer your engine will last. Don't use parfin based oil as it will damage your engine.

Nov 01, 2009 | 2006 Nissan Maxima

1 Answer

What type of oil to use when changing oil

For any four cycle engine (engines with separate oil and fuel fill locations) use high quality detergents in the following viscosity.

For Briggs & Stratton engines use an SAE30 oil above 40 degrees F (4 C) and below this temperature use 5W-30.

For Tecumseh engines use an SAE30 oil above 32 degrees F (0 C) and below this temperature use 5W-30.

For Kohler L-Head engines use an SAE30 oil above 32 degrees F (0 C) and below this temperature use 5W-30. For Kohler Overhead Valve engines use a 10W-30 above 0 degree F (-18 C), and below this temperature use a 5W-30.

For Honda engines,10W-30 is recommended for general use, and above 55 degrees F (10 C) you can use an SAE 30.

For MTD Brand engines, SAE 10W-30 is recommended for general, all-temperature use.
(From the MTD answer pages). Best regards, --W/D-- Please feel free to rate my solution. Thanx.

Jul 25, 2009 | Mtd Yard - Man 160cc, 21" Self - Propelled...

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