Originally Posted By: gryffinwings
Originally Posted By: A_Harman
Originally Posted By: gryffinwings
Originally Posted By: Dyusik
Mobil 1 is thinner with the same HTHS, reduced consumption... I'm willing to bet you will return to it if you try anything different for one reason or another.
Yeah it's bizarre, I went from the thicker oil to a thinner oil and I get less consumption even at higher RPM, with Valvoline Maxlife 10w40, I was getting a decent amount of smoke at start up, but I'm not getting that with the Mobil 1 High Mileage 10w30, I wonder if the Valvoline Maxlife 10w40 is more volatile.
Anyways the only reason I would change is because I'd be changing to a higher performance engine DOHC 1.6 liter engine D16A1 which will be built fresh. What I might do for oil is use Mobil 1 FS 0w40, similar cSt specs to High Mileage 10w30 and better HTHS at 3.8. Anyways I won't know how the oil works until I do the build and run the oil. I've started to use cSt as a basis for comparing oil weights, since oil weights seem to have a range that they sit in.
My opinion is you should stick with the Mobil 1 10w30 HM for your current engine.
The FS 0w40 would be nearly indistinguishable from it, because the HTHS dropped from 3.8 to 3.6 when they created the FS version.
I could swear I was reading 3.8 on the Mobil 1 website a couple of days ago.
Nope, I just checked the Mobil site, and it's 3.6.