I am aware of the fact that the oil topic has been discussed extensively in the past. However, I would like add some data coming through my personal experience (I am just a 300zx owner and not a mechanic with extensive technical knowledge). Last thing I want to do is to start a debate again.

 

Story:

10-15 degrees (Celcius) reduction in oil temperature by changing oil. Went from Castrol RS 10w-60 to Morris Multilife competition 10w-50 fully synthetic. Weather conditions and style of driving were the same.

 

P.S. The engine has done 8000 miles after an engine rebuild (still using the old tubs and no forged parts). Boost is set at 1.0 bar.

:confused:

I just thought that a 10-15 degrees (Celcius) reduction in oil temperature is a good thing for the engine. That's all.

I just thought that a 10-15 degrees (Celcius) reduction in oil temperature is a good thing for the engine. That's all.

 

I would think your right, thats quite a drop though, what did it drop from / to?

Dunno why the oil temp would drop that much unless the 10w60 was too thick to flow through the cooler ! (Obviously, thicker oil also saps a bit of power too when the crank webs go sloshing through that treacle on each revolution, so that would also contribute towards heating)

 

Anyway, I've used Morris 10w50 fully synth for about 40,000 miles and it seems fine.

It dropped from 100-105 degrees celcius (parked, after hard driving with boost controller set at 1.0 bar) to 85-95 degrees celcius (in similar conditions- morris oil). Quite a difference!

 

 

Sorry for the delay in replying.

It's because thinner oils dissapate heat better (remember I don't recommend 10w-60) and the thicker the oil, the more friction and that equals heat and wear.

 

These cars are designed to run on an sae 30,40 or 50.

 

Cheers

Simon

Dunno why the oil temp would drop that much unless the 10w60 was too thick to flow through the cooler ! (Obviously, thicker oil also saps a bit of power too when the crank webs go sloshing through that treacle on each revolution, so that would also contribute towards heating)

 

Anyway, I've used Morris 10w50 fully synth for about 40,000 miles and it seems fine.

 

Is this the stuff you use Andy ?

 

http://www.morrislubricants.co.uk/productinfo.asp?v06c41q7p6=EF

FFS he even sends out little helpers :rofl:

Thats the stuff ive been using for over a year now and i reckon its better than most. :bow:

Is this the stuff you use Andy ?

 

http://www.morrislubricants.co.uk/productinfo.asp?v06c41q7p6=EF

 

Yep, that's the stuff.