Then what are these numbers listed about at the beginning of the thread here:
Lucas Virgin
TBN - 0.1
Visc - 615.3 FP - 435
Calcium - 3
Magnesium - 1
Phosphorus - 4
Zinc - 2
Rotella T / LOS 5 to 1 blend
TBN - 8.5
Visc - 115.4 FP - 420
Boron - 17
Silicon - 2
Calcium - 1442
Magnesium - 7
Phosphorus - 604
Zinc - 817
Is that at 40C or something? According to
http://63.240.161.99/motoroil/oildatasheets.html that AEHaas showed me, the 10w-30 GTX viscosity is 72 @ 40C. That 5:1 Rotella/Lucas mix showed a 115.4 viscosity. I guess that is at 40C. I'm just learning all of this... sorry if I'm noobish.
So, if that is the viscosity at 40C, then my 72 has also probably risen to around 110 - 130. I can't seem to find what type of rotella was used in the sample above in this thread. But, if that's correct, doesn't that mean that the lucas is turning my 4:1 (5 quarts total) GTX 10w-30/Lucas mix into the equivilancy of a 15w-40 or 20w-50 mix?
It says it helps cold starts because it forms a layer over all the moving parts. I see that good in a way, but I don't want that thick of an oil running through my engine.
But, wait, if that is at 40C, I'm really curious to know what a mix like mine, or the original mix of Rotella/Lucas above, has a viscosity of at 100C. Do you think it changes my 10.6 to maybe just a 10.8, or is it the type of additive that would make my oil around a viscosity of 20 @ 100C??
I'm about to go drain it out right now! It's got me worried... although I have been using it for awhile and like the way the car operates with it. I'm glad I have been reading this site, but it is inducing a lot of stress on me.