I drive a 2013 Fit, manual transmission. I shift by sound. When accelerating, I shift up when RPMs reach 3000. When decelerating, I have developed the habit of blipping the accelerator pedal to get 3000-4000 RPMs before engaging the lower gear. It's so automatic that I can't even remember whether I do this (1) while still in the higher gear, with clutch pedal down; (2) in neutral, with clutch pedal down; or (3) in neutral, with clutch pedal up. Maybe all 3, depending on whether I've been coasting in neutral before downshifting. This seems to have served me well in my last car (Tercel), which I never had to change the clutch or syncros on, and hardly ever the brakes (can't even recall if I ever did) before retiring it.
I've read conflicting information online about how long to drive gently for before driving with high RPMs. Some estimates ballpark the warmup time at 15 minutes -- that would be a pain, as it is half my drive. I have three questions about this.
(1) Is shifting up at 3000 RPM "gentle" enough?
(2) Is blipping the RPMs into the high 3x00's harmful?
(3) I hit th highway in less than 5 minutes, where I drive in the high 3x00's. Is this harmful? I don't drive erratically or with a high speed difference with the traffic in adjacent lanes, but I do drive in the high speed lanes. I don't look forward to being confirned to the slow-lane.
I used to think that, with the consistent viscosity of synthetic oil, 30 seconds of stationary warmup was enough (it's way more than required). But with what I've read, I'm wondering whether that warmup time is just to get moving, and whether I'm stuck having to stay in low RPMs for quite a while after that.