Re: Switching oils

[Michael Williams <urquattro@surfree.com>]

Daniel Hussey decided to speak these words:

>    I'm currently running winter wieght 5W50 Castrol Syntec in my car.  Over
>due for an oil change, but want to switch to a thicker weight for summer.  I
>just bought some Castrol Syntec 10W30.  Do you listers think this is enough
>for summer.  Summer's in Wisconsin are rather mild and don't typically get 
>past
>the 80s.  Just want to see what most of you use in the summer.



Couple things, its fine.  Another, synthetic blends are BS, they maybe 
have 15-20% synth in there....its just marketing.

Another, synthetic is much better than dyno for pumpability, viscosity 
stability and resistance to thermal breakdown.

to give you an idea, even if you run a 10w30, at least a synth oil, your 
oil temps would ahve to be well above 200 degrees celcius to cause 
thermal breakdown.  any 50 weight in our cars is overkill and just causes 
frictional losses....not necessary...

later...

Michael Sheridan Williams
ICQ# 11740998
1983 UrQuattro, MC--1.8 BAR, borla, 16x7.5 OZ Mito's w/ SP8000's, K&N
1985 4000S Quattro miles, Koni Yellows/Coilover (2B), strut brace, Sport 
8000 Tires, K&N
http://members.aol.com/daserde2