I did NICEoff for only a few minutes each time but twice on a hill, I must have reached 75 mph and 4 miles
all other times were about 35mph for a flat mile. Now I'm aware, the miniscule mpg benefit of NICEoff probably isn't worth the potential $100s repair.
For NICE on, is the mpg savings actually significant? I believe idle rpm is like 1 US gallon per hour + don't have to hit the gas at the bottom of the hill VS engine braking using zero gas + accelerator at bottom of the hill. Are there any conclusive results? Thanks everybody