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04-09-2010, 05:43pm
Steve,
Doesn't sound like you have a problem at all. The temp will always increase when stationary and if not in the red zone its OK.
Also why use 20w50 oil (especially in a new engine) when the manual states 10w40? Running the thicker oil may actually increase the internal temperature of the engine (though probably only marginally) from what Ive read.
Now before I get flamed the reason for the increase in temps with thicker oil is;
Thicker oil has higher internal friction (yes oil has friction) and friction = heat.
Thicker oil has lower flow rate, lower flow rate means less volume past bearings etc reducing the affectiveness of the oil to act as a coolant (one of its important jobs).
From memory 20W50 is for vehicles produced in the mid 90s and before. Even the Gen 1 Busa (1999) spec'd 10w40.
Having said this, running xW50 wont damage your engine and some will argue will give better boundary lubrication (though x should be as low as possible).
Cheers
Steventh
Doesn't sound like you have a problem at all. The temp will always increase when stationary and if not in the red zone its OK.
Also why use 20w50 oil (especially in a new engine) when the manual states 10w40? Running the thicker oil may actually increase the internal temperature of the engine (though probably only marginally) from what Ive read.
Now before I get flamed the reason for the increase in temps with thicker oil is;
Thicker oil has higher internal friction (yes oil has friction) and friction = heat.
Thicker oil has lower flow rate, lower flow rate means less volume past bearings etc reducing the affectiveness of the oil to act as a coolant (one of its important jobs).
From memory 20W50 is for vehicles produced in the mid 90s and before. Even the Gen 1 Busa (1999) spec'd 10w40.
Having said this, running xW50 wont damage your engine and some will argue will give better boundary lubrication (though x should be as low as possible).
Cheers
Steventh