What is the best way to improve fuel efficiency on a Ford Transit Custom?

I recently purchased a Ford Transit Custom and I've noticed that my fuel consumption is higher than expected. I was wondering if there are any tips or modifications I can make to improve fuel efficiency and save on gas costs. Any suggestions would be greatly appreciated!

One way to improve fuel efficiency is by keeping your tires properly inflated. Under-inflated tires can decrease fuel efficiency by up to 3%. Make sure to check your tire pressure regularly.

Another tip is to avoid excessive idling. If you're going to be stopped for more than 30 seconds, it's more fuel efficient to turn off your engine and restart it when needed.

Consider installing a performance chip for your engine. These can optimize your fuel-to-air ratio and help improve fuel efficiency. Just make sure to do your research and choose a reputable brand.

Don't underestimate the power of good driving habits. Avoid aggressive driving, such as quick acceleration and hard braking, as this can greatly reduce fuel efficiency.

Regular maintenance is key. Make sure to follow the recommended service intervals for your Ford Transit Custom. This will ensure your engine is running at its most efficient.