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10w - 30 or 10w -40

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MikeBike
21 hours ago, motorbykcourier said:

 

8000 miles on the dot - or very close and fully synthetic - Castrol Racing 10W40

Is yours the DCT?

 

My dealer has always used 10W-40 in my DCT. Reads "MOTUL 10/40 SEMI-SYNTHETIC".

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motorbykcourier
1 hour ago, MikeBike said:

Is yours the DCT?

 

My dealer has always used 10W-40 in my DCT. Reads "MOTUL 10/40 SEMI-SYNTHETIC".

No just straight forward …...

If you know what I mean :blink:

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motorbykcourier

Have also tried some expensive 'nano technology' oils' - but always come back to Castrol.

Sorry, just my preference.....:angel:

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GerJ
On ‎07‎/‎10‎/‎2018 at 14:39, Tonyj said:

Ah now we are talking , tyre pressure ! Got to be a long one this . I’ll start it . Should I use air or a mix . And what ratios work best for sporty commute/ touring use . Sometimes with a passenger but most times without . And mostly northern hemisphere, but I might go south . :0))

I get the best results with 78.09% nitrogen, 20.95% oxygen, 0.93% argon and 0.04% carbon dioxide. Somewhat higher proportions of carbon dioxide will not affect tire pressure, but may have other negative side effects.

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Andy m

Take care with that mix, it can contain aerosol hydrogen dioxide. 

 

If using bottled, make sure you don't get the wrong bottle off the gas axe. Acetylene will really ruin your ride. 

 

Andy

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SteveThackery
20 hours ago, MikeBike said:

My dealer has always used 10W-40 in my DCT. Reads "MOTUL 10/40 SEMI-SYNTHETIC".

 

Well he shouldn't.  The specification is perfectly clear: 10W-30 in temperate climes.

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GerJ

The dealer of my wife's NC uses MOTUL 10W-40 full synthetic, probably because that is what they need for most other bikes. It seems to have no ill effect on the NC and, with Summer temps over here peaking at 38° C, our climate is not that temperate anymore.

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Trev
22 minutes ago, SteveThackery said:

 

Well he shouldn't.  The specification is perfectly clear: 10W-30 in temperate climes.

 

Steve, I'm with you on this, I just don't get why people insist on trying different oil grades to those specified by the manufacturer (excepted of course if they are 5000 miles into their round the world trip and can only get 10w - 40 in Mongolia), it's not as if it's difficult or costly to get the right grade and any difference in performance or engine wear would be so slight (if at all) that no one is going to notice.

 

Slightly contrary to that, my GSXR1000 manual states several oil grades can be used depending on extremes of outside temperature and use so I just plump for the one that covers the widest range. Perhaps if I went up a viscosity I would see another 0.2bhp at it's next dyno run, hmmmmmm, worth thinking about .............. :hmm:  :frantics:  :D

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Andy m

It's like having 500 TV channels and then watching Corrie and Stenders, mostly just something to talk about down the pub. 10W97 fully sympathetic with added nigellium as used by TT winners just ticks boxes for some people. 

 

The dealers use 10W40 because they buy it in 50 gallon drums and can't be bothered to order anything special. Has anyone ever made a dealer change it again? Did they, or did they just write another bill out? They know naff all about DCT (or other things, for example that my CB handbook says oil at 8000 miles not 4000 as they told me when I picked it up) and don't care. 

 

Andy

Edited by Andy m
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Rocker66
6 minutes ago, Andy m said:

It's like having 500 TV channels and then watching Corrie and Stenders, mostly just something to talk about down the pub. 10W97 fully sympathetic with added nigellium as used by TT winners just ticks boxes for some people. 

 

The dealers use 10W40 because they buy it in 50 gallon drums and can't be bothered to order anything special. Has anyone ever made a dealer change it again? Did they, or did they just write another bill out? They know naff all about DCT (or other things, for example that my CB handbook says oil at 8000 miles not 4000 as they told me when I picked it up) and don't care. 

 

Andy

Sounds as though you need to change your dealerthen if they really are as clueless as you suggest.

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Andy m

I don't use a dealer. I train them, so see the level of recruit, the pressure they put them under, the management etc. Some are OK, some shouldn't be trusted with lego, none take care I do with my own work. 

 

Andy

Edited by Andy m
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Rocker66
16 minutes ago, Andy m said:

I don't use a dealer. I train them, so see the level of recruit, the pressure they put them under, the management etc. Some are OK, some shouldn't be trusted with lego, none take care I do with my own work. 

 

Andy

Then maybe you could use the word “some” rather than insinuate that it applies to all dealers. I know that the guys at my dealers are trained on site at at the Honda UK training centre and I’m sure that this applies to other dealers.

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Graham NZ

I know that when I do an oil change it's done more correctly than a dealer could spend the time doing that.  Drain the oil when really hot, leave the drain plug out overnight to allow as much old oil as possible to drain, refill to the correct level, run the engine for a few minutes, adjust the level again.

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shiggsy
4 hours ago, Trev said:

 

Steve, I'm with you on this, I just don't get why people insist on trying different oil grades to those specified by the manufacturer (excepted of course if they are 5000 miles into their round the world trip and can only get 10w - 40 in Mongolia), it's not as if it's difficult or costly to get the right grade and any difference in performance or engine wear would be so slight (if at all) that no one is going to notice.

 

Slightly contrary to that, my GSXR1000 manual states several oil grades can be used depending on extremes of outside temperature and use so I just plump for the one that covers the widest range. Perhaps if I went up a viscosity I would see another 0.2bhp at it's next dyno run, hmmmmmm, worth thinking about .............. :hmm:  :frantics:  :D

 

Because there is nothing wrong with using 10w-40, in-fact it's safe as it covers a broader temperature range.  There are no real downsides to using 10w-40 over 10w30, it may impact fuel economy minutely, you would expect it to be slightly more expensive but it seems to be identically priced. 

 

The downside to 10W-30 is if the outside temperature goes beyond its range, which usually in this country it won't but occasionally it does, and it did this year.

 

(I do actually use 10W-30 in mine).

 

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