Service manual favors 10W-30 oil

[dBuster_imp]

I think it is safe to say we all know the oil charts and what is better for different temperature ranges but it has been shown to be a fact that the mother ship Honda has deemed in their service manuals for our bikes that they recommend 10w30.

Now in Japan the temperatures do get up into the 90's and it is a tropical humid 90's, spent four years overseas and can confirm this. With the high humidity and 90 plus degree weather you would think they would recommend more than just the 30 weight oil but hey that is what they recommend.

Like I have said, each bike may look alike but each bike is different. Some may run just fine with 40 weight oil while others will gripe about it until you go back to 30 weight oil. If you can run 40 weight and your bike isn't making noises or that you don't notice as they may be so minor unnoticeable noises then go for it. I do believe this thread was just stating what the service manual calls for, or recommends when changing the oil in our bikes.

Now depending on what chart on what website you go to our what book you go to it is hard to say the differences on some. Here are just a few.







Note two of those charts you would be hard to tell the benefits of the 40 weight over the 30 weight but rather the 30 weight has a lower operating temp but on the upper end of the temperature scale it just points off the scale for both weights.

The point being, run the viscosity of oil you want to run, just bear in mind Honda recommended 10w30 and they must have had a reason to do so. If you run 40 weight and have no problems or noises I applaud your bike for being able to handle it and or your cam tensioner is adjusted or set properly....

Keep the wheels down and enjoy the ride!

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[Red Mist_imp]

This is page 3-14 of the Honda Service Manual for the 2013 Honda CB1100. This picture was taken from my copy, but it was pointed out to me by the Service Manager, (in his copy), at my local dealer. Read the sidebar, it clearly states that you may use "other viscosities" as listed on the chart, (40wt.), if the average temperature in your riding area is within the specified range. There are three places in the service manual that I have seen, that list specification for engine oil, this was the only place that mentions 40wt. oil. It is there, however, and that's enough.

The chart could be better, I interpret it as 60 degrees F or higher. The Service Manager added that they used 40wt. at set up for all of the CB1100s they sold, (salesman once told me they sold 12 of them). They have had no reported issues with it. I thought I was switching to 40wt when I did my first oil change, turns out, it had 40wt. from the start.

It's in the service manual, if you live in a warm climate, and you are using 40wt., you are ok.


[url=http://s1290.photobucket.com/user/dsargee/media/20140412_211526_zps96e488ca.jpg.html]

Believe what you wish, but it's right there in the service manual.

Absolutely, positively, my last comment ever on the subject of engine oil.

That chart seems to indicate that either weight can be used for the specified temperature range. The chart is not particularly clear on that, but charts which show temperature ranges per oil grade have a separate band for each grade. This one seems to show that either 10-30 or 10-40 is acceptable across the range shown.

My owner's manual is different. It only shows 10W30, nowhere in the manual does it recommend 10W40. Pages 46 & 122.

The manual for my Yamaha is quite different. It recommends a variety of oils for various temperature conditions; 10W30 is from -10 F to 70 F, while 10W40 is from -10 F to 110 F. It also allows 15W40, 15W50, and 20W50 depending on the temperature range to be expected.

Since the expected temperatures in my area will be in the 10W40 range, that's what I use.

[Cormanus]

In support of David, and for the purpose of information, here are the pages from the 2010-11 CB1100 Australian Owner's Manual. Maybe there's ambiguity: the first page mentions only 10W-30, but in the section on viscosity it makes clear those in warmer climates should use 10W-40.




For reference, the manual is available here—http://www.hondampe.com.au/docs/owning_a_honda/owners_manuals/motorcycles/CB1100A2010.pdf
For further reference there's a European manual here—http://www.hme-tc.be/TRG_LIB/NM2013/CB1100/DOCS/CB1100A_OM_ENG.pdf. I can't find a US one on the web.

[Red Mist_imp]

Castor (bean) oil. Straight grade.

Bet that's what you give that danged hoss!

Bet that's what you give that danged hoss! He follers up five gallons of beer with a couple gallons of pure caster oil as a chaser. That's his secret, after polishing off about six buckets of oats.

So tell me, this castor oil, is that orally taken, used topically, out in the engine or mixed with gas in the gas tank?

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Just pour it in every orifice. It'll find its way out.

[HikerToo_imp]

The Walking Thread.

ha ha, we met Shane from Walking Dead while on vacation in New Hampshire :-)

[furious_blue_imp]

I really, really didn't want to get in on this, however when I was down picking up oil and filters the other day for my bikes I asked the Parts Manager (27 years as parts manager) about this and he said and I quote " Up until 2006 Honda recommended 10w40 weight oil for their bikes. Starting in 2007 Honda started recommending you use 10 W 30 in their bikes" then he pointed to the following Honda chart which I took a picture of and am posting below

[url=http://smg.photobucket.com/user/theferret111/media/march31007_zpsa24bed3a.jpg.html]

So I said... so my ST is a 2006 and Honda wants me to use 10w40 but if it had been a 2007 ST it would call for 10W30? He said "Crazy huh?" I said yep!

So I bought a gal 10w40 for my 2006 ST (which is what I always used anyways) and a gal 10W30 for my 2014 CB 1100 as Honda recommends( which I used in my 13 anyways) plus 6 oil filters, an air cleaner for the ST, brakes all around for the ST etc

Americans are a stubborn bunch, as in "I've been using 20w50 synthetic dino oil in all my vehickles for 30 years and never had a problem" so keep on using any weight any type oil you have faith in, but Honda DOES "recommend" 10w30 for the CB 1100.(and all Honda motorcycles manufactured starting Jan 1, 2007)

Well. The obvious reason one weight is ok for one year and not the other is an engineering change, that being larger galleries or a higher oil pressure or both.

So, I suspect if the designer of my bike says 10w30 then by God they mean 10w30 and no generic shop manual overrides those specifications for a specific engine. At least one of you tends to waive some shop manual around like it somehow is the secret Gospel that only those in the know use to change owner specifications for a specific bike and my concern is some owner is going to belief you and damage their engine in the long run. I won't because I can clearly see Honda wants 10w30 with some additional motorcycle only specifications in the bike. This makes is simple for me to determine what weight and what grade oil must go into the CB1100 no matter if it rains or snows or is damn hot that day, 10w30 is it because Honda says it is. So it is. Nothing else. Wear your bike out with too heavy an oil on startup, where most wear occurs, but don't talk someone else into doing it.

Well. The obvious reason one weight is ok for one year and not the other is an engineering change, that being larger galleries or a higher oil pressure or both.

So, I suspect if the designer of my bike says 10w30 then by God they mean 10w30 and no generic shop manual overrides those specifications for a specific engine. At least one of you tends to waive some shop manual around like it somehow is the secret Gospel that only those in the know use to change owner specifications for a specific bike and my concern is some owner is going to belief you and damage their engine in the long run. I won't because I can clearly see Honda wants 10w30 with some additional motorcycle only specifications in the bike. This makes is simple for me to determine what weight and what grade oil must go into the CB1100 no matter if it rains or snows or is damn hot that day, 10w30 is it because Honda says it is. So it is. Nothing else. Wear your bike out with too heavy an oil on startup, where most wear occurs, but don't talk someone else into doing it.
I'm late to the oil party, but I completely agree with this. A motor from 10 years ago is probably NOT the same as a motor today, even if it does externally look like the one we knew 10 years ago..

'it's got 4 cylinders and is air-cooled, of COURSE I know what it is. I used X 10 years ago and it was fine, so I'll use X today, because that's what I did then and nothing bad happened !'

The situation kind of reminds me of when radial tires first started appearing.
The mechanics at the dealer were constantly under inflating my tires because they were probably just doing what they always did.

Multiple times I had to mention to the dealer that their mechanics did NOT read the specs and were underinflating the tires..