I have a doubt: It's for a total stretch of 170 km from Thiruvalla to Thrissur. And 170 km return journey as well. Similar traffic conditions, Full AC. For the Thiruvalla to Thrissur stretch, the first 85 km was a mixture of bad roads, and uphill/downhill twists and turns. At the end of this stretch - Muvatupuzha - , my FE was 17.0-17.1 KMPL. The remaining 85 km was a good stretch, where you could easily drive at 120 kmph, though i kept it down to 80kmph. After reaching Thrissur, once the distance covered was 170 odd km, and the total FE rose upto 18.5 KMPL. Now, on the way back, the first 85 km, ie from Thrisur to Muvatupuzha, the FE showed was like 23.8 or so. After the remaining 85 km of twists, turns and uphill/downhill driving, the FE settled at 21.7 KMPL. I even had a bit of offroading when i had to drop someone off at a place which had poor roads, that couldn't even admit bullock carts. Still, 21.7 KMPL. I am puzzled. Same road, almost similar conditions. Onward journey: 18.5 average. Return journey: 21.7. More than 3 KMPL difference. Is there any explanation for this?