Welcome to ecomodder !
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Originally Posted by mcbota
I own an Audi A4 diesel, 96 KW, and being new here I am very interested which are the best methods to increase fuel, hypermiling especially in city.
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One of the things that got my diesel consumption down (previous car), was coasting in neutral .
Car didn't like rolling starts, and ignition key was known weak spot, so no engine-off coasting.
Another trick is to pulse & coast :
Accelerate to a speed that will get you to the next light / corner / turn / ... at an appropriate speed, then put the car in neutral and coast until you get there, repeat.
Drive in the highest possible gear once the engine is warm - I could do 30kph in 4th
If you have CC, it might help even in the city.
Use the lightest weight oil approved for your car .
If it can use 0w30 instead of 5w40 , use 0w30 .
If you do a lot of city driving, dump any excess weight that may be in your car.
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I use to downhill on my trip to work in the morning, when the car is not warm.
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That's OK, if the speed doesn't build up too much
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Which is the best method to coast: in gear or neutral?
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Depends on the conditions :
if you have to slow down anyway or keep speed in check going downhill: in gear
if you want to roll as far as possible / without as little speed loss as possible : in neutral
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It is worthy to put something in fron of the radiator, even in the spring-summer time?
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It reduces the amount or air going into the engine compartment (and back out), and in doing so, reduces aerodynamic drag.
Do keep an eye on engine temperature though.
You want to have a warm diesel engine, not one running too hot.
Fresh intake air is best, except in a cold winter.