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CBR125 & 150 - Which Oil to Use? https://www.cbr125world.com/forum/viewtopic.php?f=18&t=5 |
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Author: | cmjdjm1 [ Sat Mar 29, 2014 4:32 pm ] |
Post subject: | Re: CBR125 & 150 - Which Oil to Use? |
Here's a quick question for you Marvin....You mentioned weather permitting with regards to the 0W40 synthetic. What exactly do you mean? I was going to do an oil change tonight I think and was wondering what the weather requirements were. In the summers here it easily hits 90-100 degrees Fahrenheit. But at the same time I've been riding the bike in 30 degree weather too. Which do you think would be better for me? the 0w40 or 10w40? |
Author: | mmiller [ Sat Mar 29, 2014 5:06 pm ] |
Post subject: | Re: CBR125 & 150 - Which Oil to Use? |
I have no idea what a Fahrenheit is anymore But, if the choice is between 0w40 and 10w40 the answer is always to use the lowest winter rating available. The W actually stands for winter. It does not stand for weight. You want the oil to be as runny as possible when cold because cold-start is where most engine wear occurs. So 0 is better then 10. The 40 indicates the oil's grade when hot. In simple terms; The colder it is outside, the lower you want the first number. This number cannot really be too low so lower is always better. The hotter it is outside, the higher you want the second number. This is dependent on just how hot it gets outside and your engine. The first number, the winter rating, can be as low as possible. If you could get a -40w40 that would be just peachy but they don't exist. Most of us don't live at the North Pole anyway so it's not that big of a deal but lower is always better. According to the Internet, 100 Fahrenheit is actually 37.7778 Celsius. That's fairly hot so you may go higher on the second number although, personally, I would not worry about it. A true synethic (as pictured) is a pretty stout performer and will always run about 25 degrees cooler than dinosaur oil. I once recommended 0w40 to a fellow in Australia, not taking into account their summer temperatures, and he laughed Rightly so, if you're in a really hot place like that you want the second number to be higher. He personally mentioned something about them starting at 50... I have no experience down there so it's better to defer to someone who lives there and truly understands from experience. The Honda recommended oil, according to the service manual, is 10w30. 0w40 is far superior because it has much better cold-start performance and much better hot weather performance. The rule of thumb is this, you always want the first number to be as low as possible and you want the second number to fit in with your average highest temps during riding. I would think that 40, given your expected temps, will give you lots of leeway and should be a good choice but this is somewhat subjective. If it were me, I would not worry about running 0w40 at those temps in a true synthetic as pictured. |
Author: | cmjdjm1 [ Sat Mar 29, 2014 5:59 pm ] |
Post subject: | Re: CBR125 & 150 - Which Oil to Use? |
Thanks so much for the in depth answer! I was reading it while standing in front of the oil in Canadian tire actually. Turns out it's on sale right now for $15.99. They were all out of 0w40, only one left of 10w40 and tons of 20w40. I ended up getting the 10w40 since I'm hoping to do it tomorrow. Only took two trips there to buy it too after making it to the register only to find out I'd forgotten my wallet in the motorcycle jacket I wore last night. Grrr. Anyways, thanks for the advice! |
Author: | mmiller [ Sat Mar 29, 2014 6:48 pm ] |
Post subject: | Re: CBR125 & 150 - Which Oil to Use? |
Excellent news and interesting that you're getting advice while at the store The only way, that I can see, to achieve the OEM oil change interval is with true synthetic. If you rev the engine at all conventional dinosaur oil will shear out long before then and get destroyed in the process. It's not just RPM that kills dinosaur oil - it's also the fact that it gets sheared and beat to hell as it goes through the gears in the transmission. In fact, I suspect that's where the brunt of the oil shear occurs. True synthetic will make more power then sheared out dinosaur oil - that's a fact. This occurs because as dinosaur oil shears out it becomes thicker and thicker and this robs power from the engine. It's harder for it to operate with very thick oil then with oil that is of the proper viscosity. True synthetic will not shear and you will have the same oil consistency right up until the oil change interval. Two things that are part and parcel of true synthetic though is that the engine will be a bit noisier, you tend to hear the ticks, and the second is that your oil will run about 25 degrees cooler - which is good since our bikes do not have an oil cooler. I guess if I had mentioned to bring your wallet I could have saved you a trip I find the fact that you were reading this while at the store too cool |
Author: | cmjdjm1 [ Sat Mar 29, 2014 7:12 pm ] |
Post subject: | Re: CBR125 & 150 - Which Oil to Use? |
If only you'd reminded me to bring my wallet! Funny thing was I left the bottle of oil with the cashier after telling her I forgot the wallet. I went back to the same cashier and she said they'd been taking bets if I would come back lol. My car was one of only three in the parking lot so I'm guessing they're bored lol. Anyways the main reasoning I went for synthetic over conventional was your mention about making it to OEM recommended oil changes and the cooler engine. I'm horrible for doing maintenance on my cars, probably because I've never owned a car longer than three years, but I'm going to try my best with my new baby :) |
Author: | mmiller [ Sat Apr 19, 2014 11:25 am ] | ||
Post subject: | Re: CBR125 & 150 - Which Oil to Use? | ||
For those interested in learning more about Motorcycle Oils you can find attached Amsoil's "A Study of Motorcycle Oils - Second Edition"
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