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What year is your Clio?
Newer cars run very lean off boost but can run very rich on boost (power OR economy). A lot of diesel driving tips relate to old tech.
I have 2016 dCi-140 (1.6), here are my tips.
Use eco mode if you have it. Eco mod reduces acceleration enrichment (ie give soft throttle response). If you don't have Eco mode, remember your right foot controls your AFR (to an extent), so be gentle.
Cruising at a steady speed is far better than P&G
I accelerate at up to 80% load, in my van there's a throttle stop that in Eco mode gives me an easy way to drive that way without looking at the SGII. Accelerating slower, keeping boost low definitely helps my city economy.
After accelerating to cruise speed, lift off completely for a couple of seconds, then gently add throttle to maintain speed. The ECU goes into DFCO and when you add throttle, you're running lean cruise mixtures immediately.
I'm now regularly seeing 5.5/100km (40+MPG). I'd love to see what this engine would do in a car half my van's size and weight.
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