quote:
Originally posted by buster:
This is Amsoil's best oil IMO and many others. It has the strongest additive package available. It compares to D1, although I think D1 is better.
Have you compared the oils specs?
Delvac-1 5w-40 pour point = -49F / -45C
Amsoil 15w-40 pour point = -47F / -44C
Amsoil 10w-40 pour point = -54F / -48C
Amsoil Series 3000 5w-30 Pour Point = -60F / -51C
Delvac-1 5w-40 flash point is 439F / 226C
Amsoil 15w-40 flash point is 453F / 234C
Amsoil 10w-40 flash point = 450F / 232C
Amsoil Series 3000 5w-30 Flash Point = 446F / 230C
Delvac-1 NOACK = 13%
Amsoil Series 3000 5w-30 NOACK = 8.6%
Amsoil 10w-40 NOACK = 7%
Amsoil 15w-40 NOACK = 6.7%
The ASTM D-5800 (NOACK) is a widely accepted method of measuring volatility. Originally developed and used in Europe, the NOACK test determines how much weight loss an oil experiences through volatilization.
Volatilization is the term used to describe what happens to a fluid as it is heated to the point it begins to "boil off." Upon reaching a certain temperature, oil will begin to lose some of its lighter weight molecules as they "boil off" and leave heavier weight molecules behind. Not only does this cause higher oil consumption, this process can also cause increased viscosity making the oil more difficult to circulate through the lubrication system.
In the NOACK test the oil is heated to 482F/250C for one hour. The lighter oil fractions will "boil-off," leading eventually to oil consumption, oil thickening and a loss of performance. The test reports results in the percentage, by weight, lost due to "boil-off." European standards limit high quality oils to a maximum of 13 percent loss.
Bottom line, the lower the volatility, the less chance of oil consumption.
[ June 14, 2003, 08:53 AM: Message edited by: TexasTDI ]