[bandit86]

I have spent way too much time driving and watching the scangauge, I posted previously that my car likes throttle position at 23 units.

Today I had an idea while driving, maybe you guys can help me out; cruising at 70mph I get the same instant mpg as 60, this is over thousands of miles and yes 55 is way better, but bare with me. At one pointing in the rpm range the oil pressure increases and the variable valve train goes to work to give more lift or lo get lift I have no idea. When that happens more air enters the engine, so it would work harder which would mean decreased throttle for more manifold vacuum

So which is better, more lift and less throttle or less lift and more throttle?

If changing valve train geometry is important, would changing to thinner or thicker oil benefit to change oil pressure