Mobil 1 0w30 report (long)

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <199802050038.QAA03711@odf> luis@odf.UCSD.EDU (Luis Patino) writes:

> With the previous oils (Amsoil 2000, Castrol Syntec) oil temps
> used to stay to around 130 C while cruising at 80 MPH 
> (130 km/h), and once got to 150 C while driving in the hot
> desert near Las Vegas. However, with Mobil 1 0w30, the cruising
> temp stays steady at one notch below 100 and even going uphill
> at 90 MPH the oil temp stays at the 100 mark.

130 degrees is about right for sustained cruising.  100 is _way_ too low.

As well as being below the design temperature, 100 is not enough to remove 
some of the nasties that gradually blow/seep past the rings.  Such nasties 
include even water, as a combustion product.  Getting the oil up to design 
temperature helps evaporate these through the breather system.

-- 
 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club