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Old 06-29-2008, 12:01 PM   #1
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OIL WEIGHT?

Searched around, couldn't find much...

For the absurd summer heat, what weight oil are guys running in their I-4 engines? 10-40? 20-50?

I'm thinking 50 would be good, particularly since MY bike runs perty hot (195-205 on teh track).

Opinions por favor?
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Old 06-29-2008, 12:05 PM   #2
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Quote:
Originally Posted by Pre-K View Post
Searched around, couldn't find much...

For the absurd summer heat, what weight oil are guys running in their I-4 engines? 10-40? 20-50?

I'm thinking 50 would be good, particularly since MY bike runs perty hot (195-205 on teh track).

Opinions por favor?
I just posted this in the thread below this one lol

Quote:
There are plenty of acceptable brands available at Autozone, Oriellies, Napa Wallyworld ect.

I would just make sure you use a synthetic or synthetic blend and make sure you get the weight correct that's the most important part.

I like Castrol Gtx or Mobile 1 5w20 for our weather here, 10w40 is fine as well 20w50 is to thick imo unless you have a ton of miles(35k+)
This is my opinion take it fwiw
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Old 06-29-2008, 12:11 PM   #3
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just be sure you flush all of the old oil out of the fallopian tubing if you are changing weights! Trust me, you dont want sludge build up in your fallopian tubes! It could potentially lead to your flux capacitor shutting down, and those are very expensive!
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Old 06-29-2008, 12:17 PM   #4
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Originally Posted by Godsuki View Post
just be sure you flush all of the old oil out of the fallopian tubing if you are changing weights! Trust me, you dont want sludge build up in your fallopian tubes! It could potentially lead to your flux capacitor shutting down, and those are very expensive!
Dammit Tim, drunk already?

Sent choo a PM...

And get me some streamers for teh bike!
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Old 06-29-2008, 12:31 PM   #5
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20-50 here
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Old 06-29-2008, 12:49 PM   #6
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you should be fine with a 10-40 oil. I used to use 15-40 in my v-twins but those are a little different.
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Old 06-29-2008, 12:56 PM   #7
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i would not run a 20 50 in such a newer bike. not hot enough here and bearing clearances are still tight. It would just sap HP. Now in phoenix az I would run the higher viscosity. 195-205 is not hot... that is where the thermostat is set at. try running a rc51 at 225.... now that is hot.
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Old 06-29-2008, 01:55 PM   #8
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I use 10-40. It ran good with no temp issues. I had thought about switching to a synthetic but I never got around to switching.
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Old 06-29-2008, 02:01 PM   #9
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I use 5W40 right now. Seems to be alright. No track though.
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Old 06-29-2008, 02:02 PM   #10
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I figured 20-50 was OK since, theoretically, it can flow like 20 if its not so hot, or flow like 50 if its scorching!
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Old 06-29-2008, 02:05 PM   #11
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Quote:
Originally Posted by Pre-K View Post
I figured 20-50 was OK since, theoretically, it can flow like 20 if its not so hot, or flow like 50 if its scorching!
well you won't hurt anything by running 20-50.
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Old 06-29-2008, 02:22 PM   #12
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Quote:
Originally Posted by witchdoctor575 View Post
well you won't hurt anything by running 20-50.
Kewl, thanks dood!

But maybe I can drop like 10sec off my lap times with thinner oil (less thick, more power)?
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Old 06-29-2008, 02:47 PM   #13
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Quote:
Originally Posted by Pre-K View Post
Kewl, thanks dood!

But maybe I can drop like 10sec off my lap times with thinner oil (less thick, more power)?
I think you should save the weight and go without oil. It should last a pass or two
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Old 06-29-2008, 05:26 PM   #14
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Quote:
Originally Posted by witchdoctor575 View Post
well you won't hurt anything by running 20-50.
You can actually, depends on the tolerances in the motor. If it calls for 5-20 and you put in 20-50 in a relatively new motor the thicker oil will not be able to properly flow into the bearing journals until the oil heats up and the apparent viscosity drops. This will cause premature scoring of the bearing journals.
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Old 06-29-2008, 05:28 PM   #15
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Quote:
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Kewl, thanks dood!

But maybe I can drop like 10sec off my lap times with thinner oil (less thick, more power)?
Actually you would be surprised how much difference can be seen on a dyno with different weight oils.
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Old 06-29-2008, 05:31 PM   #16
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The Aprilia calls for 15W-50
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Old 06-29-2008, 05:31 PM   #17
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Quote:
Originally Posted by witchdoctor575 View Post
i would not run a 20 50 in such a newer bike. not hot enough here and bearing clearances are still tight. It would just sap HP. Now in phoenix az I would run the higher viscosity. 195-205 is not hot... that is where the thermostat is set at. try running a rc51 at 225.... now that is hot.
Quote:
Originally Posted by 90 5.0 View Post
You can actually, depends on the tolerances in the motor. If it calls for 5-20 and you put in 20-50 in a relatively new motor the thicker oil will not be able to properly flow into the bearing journals until the oil heats up and the apparent viscosity drops. This will cause premature scoring of the bearing journals.

i did mention that. As warm as is (even in the am) and him running as a track only set up, I don't think there would be too much issue. I wouldn't do it but I really doubt he would have too much issues. 95 air temp and 120+ track temps are purdy warm.
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Old 06-29-2008, 05:32 PM   #18
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Quote:
Originally Posted by DvlRacer View Post
The Aprilia calls for 15W-50

that's cause it is a v-twin. I ran 20-50 in the rc during summer months and 15-40 the rest of the year.
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Old 06-29-2008, 05:39 PM   #19
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Quote:
Originally Posted by witchdoctor575 View Post
that's cause it is a v-twin. I ran 20-50 in the rc during summer months and 15-40 the rest of the year.
What was standard operating temp for you on the RC? What would it climb to in traffic or red lights too?
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"And so, this tiny metal deathtrap becomes known as the ultimate form of freedom. Like a steampunk cyborg, man and machine fuse to make a symbol of what you can become when style and speed matter more than safety and efficiency. Is it any wonder that some people just get mad every time they see a motorcycle go by? Because it challenges everything they have, while proving to them that they donít have enough."
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Old 06-29-2008, 05:45 PM   #20
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173 at 60mpg+.... around town 220-225.... cruising the seawall once I hit 253!
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