First of all, welcome to the forum!
Secondly, yes, all those mods you mention will help. I would also recommend:
1) Remove all unnecessary weight, including unused seats.
2) Buy a ScanGuage.
3) Plan your routes carefully. The SG will help you determine which are the best.
4) Plan your trips carefully. Make fewer trips by taking care of several chores/appointments on a single trip, as much as possible.
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