Quote:
Originally Posted by Arragonis
Quick and simple question - WAI for a Diesel - good idea or not ?
|
Like some other modifications the answer depends on engine loading and your particular combination and driving conditions.
If you always hypermile with very light engine loading, then the warm air will help your fuel efficiency.
If you often load the engine and need more power, then you will want the cooler air.
For many cars this question comes down to the type of driving done. If you're mostly stop-n-go, then it's likely that you'll need the extra power. If you're mostly highway cruising, then you'll likely benefit from the warm air.
Testing each way thoroughly is the best way to determine what your vehicle wants.
Everyone's situation is different, and that's why you'll often get conflicting answers to these types of questions.