Auto FE - It's all about driving style

[MTUboi86]

Originally Posted by RoadWarrior

Depends if the motor has a tendency to puddle fuel or not in the intakes, or if it has a large amount of blowby and oil burning... either of those will mean it will possibly lean detonate if you cut fuel.


edit: in the case of high oil consumption, it could possibly lean detonate on compression.... if you've got a car that doesn't cut immediately when you turn the key off, then suspect it won't like it... even just a few fires like pup-pup-poom.

The car doesn't burn any oil at all. It only has 116,000 miles on it.

No clue about DFCO, but I know when I coast down a hill in gear, I keep a relatively constant speed until I get past 35mph?... then it starts going down the hill as if I'm in neutral and I start gaining speed, and you can hear/feel the shift (if you listen for it).

...as for braking the entire way down the hill... I dunno. I've needed a brake job every single year due to these hills. The excess heat warps my rotors. Last summer I spent the extra $$ for vented and slotted rotors, and haven't had any issues since, and still have a lot of my brake pads left. ....these are hills, where to get up them in the winter, you have to get as much momentum as possible at the bottom, then essentially floor the car... speedometer usually says 70mph, where you're only moving about 15mph. If you start to lose momentum, you're done for and have to dangerously back down the hill (well, not back down, but slide down). Of course, this is without traction control. With traction control, it's near impossible to get up the hills (sounds odd, but 'tis true). That's why I store the car for the winter and drive my 4x4 gas-hog Explorer (10mpg city, 16 hwy - something's wrong with it)