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Does having a thicker oil like 20w-50 take longer to heat bike up on cold start?

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Does having a thicker oil like 20w-50 take longer to heat bike up on cold start?

Old 08-12-2015, 08:49 PM
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Does having a thicker oil like 20w-50 take longer to heat bike up on cold start?

Just curious to know if you have two shawks, 1 with 10w-40 and the other with 20w-50, and its a cold start on a normal afternoon, would the 10w-40 shawk heat up quicker because the oil is thinner???

The reason i ask is because my 2005 superhawk is taking forever to heat up on cold start. I havent changed the oil yet since i purchased from new owner but im assuming its 20w-50 because in my 98 hawk it would heat up in like 1 minute and was ready to ride; i used 10w-40 in that one and never had a problem. Thanxs
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Old 08-13-2015, 05:49 AM
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The grade of oil in a motor has little to do with the amount of heat absorbed by coolant, metal and oil as an engine warms up. If your 2005 takes longer to warm up than your 1998, it's likely a carburetion issue.
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Old 08-13-2015, 06:33 AM
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Or a thermostat issue, or a coolant type issue.

James
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Old 08-13-2015, 10:09 AM
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I'm with James. Check your thermostat. It might be stuck open. Not to hard to get to. Lift the tank, take off the airbox and its on the bikes left side in the V of the engine. Remove the two 8mm bolts and the top will come off. It has a reusable o-ring, so you don't have to buy a new gasket. The thermostat is inside.
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Old 08-13-2015, 11:42 AM
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Gabe's 2005 has a digital thermometer. If the thermostat is operating properly and the bike is stationary, the thermometer should show the coolant warming gradually until the temperature reaches about 75 degrees Celsius and then the temperature should drop a few degrees temporarily as the main thermostat opens and unheated coolant begins to flow through the thermostat. The radiators should remain at ambient temperature until the thermostat opens. See www.vtr1000.org ? View topic - Slight overheating issue
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Old 08-13-2015, 05:14 PM
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What is normal riding temps for you ? If you mean waiting for the temp gauge to read 75*c then yes, it does take some time. This is normal.

However, you do not need to wait such a long time before riding(yes, I know you know this) but just saying. Also, for your peace of mind, if you follow Comedo's advice, you will see it does take some time before warming up leaving it on idle to see if thermostat works well.
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Old 08-13-2015, 09:22 PM
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When you say warm up I am assuming you mean rideable. So if the carb jetting is different, or carbs are cleaner or dirtier, that is more what you are talking about.

A better carb set up tends to yield rideability sooner, but has little or nothing to do with oil viscosity within reason.
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