Quote:
|
Originally Posted by Brucelee
Oil viscosity is a complex subject.
In theory, you want just enough oil film and volume to avoid metal to metal contact and to cool the engine. Too much viscosity and you waste fuel and lose a bit of power.
Too little and you have premature wear or worse.
The 20W-50 MIGHT make sense in some applications but certainly not for Boxster street use.
|
Hi,
All true. Too much viscosity and you don't have good flow. Also, heavier Oils create more
Drag on the Crank, robbing Power.
15W-50 MB1 is what I use in the Esprit, but it has the much harsher Turbocharged environment to deal with, and it's a 23 y.o. car - the technologies and metalurgies were different then. And, 15W-50 is what the Manufacturer (Lotus) calls for...
Happy Motoring!... Jim'99