Fuel tanks

[gpersilver]

I am running the 1320 gal fuel tanks on my Pete's but after I use around 470 gals the low fuel light comes on because I'm low on DEF, that wasn't happening when I first added that mod. Has anyone else ran across that issue? If so what caused it? Seems like it started for me about 2 updates ago.

[Trucker_71]

Why in the world world you want 1320 gal fuel tanks?

[RynoHawk]

Probably the mod needs updating.

[MirkoC407]

Well, usually you need half the fillings of DEF than diesel. So in real life you should fill up DEF every 2nd fuel stop. So 470 gals consumption is about two regular sized diesel fillings. Looks perfectly right to me - look for a mod that takes not only diesel but also DEF amount times 6.

[tdjpack]

for realism in actual trucking you have to fill in every state or be penalized the tax on the fuel you wouls have used (the states estimate)

[room217au]

It is possible to separately declare fuel and DEF capacities. If not explicitly declared in the chassis definition file, a default value is used. I could be wrong about that tho.
Looking in the current SCS Peterbilt 389 chassis files, it appears the fuel values are declared as litres..

	name: "Long 8x6 300@@gal@@"
	price: 33500
	unlock: 26
	info[]: "8x6"
	info[]: "150/150 @@gal@@"
	icon: "peterbilt_389/frame_bc_8x6"

which is legit because the 'info' lines are for display only and take no part in game calcs, but

	tank_size: 1136

from the same chassis def file, is in litres.
I guess this is because ATS was built with the ETS2 game engine.

To make a fuel tank capacity mod, you need to use the entire chassis def file. If the mod is specifically declaring DEF capacities, that might be the reason for the change if the mod declares some unusual variables.
As far as I know, the game calculates 'fuel remaining' as a percentage of the tank_size variable mentioned above and this calc determines whether you are "running low" on fuel.
Let's say that number is 10%.
If the tank_size is an unusually large one, then the fuel remaining warning that calls you to fuel up, might actually be a rather large number and can leave the player thinking "I have 400 miles left in this tank, and 100 miles to go to destination. Why am I needing to fuel up now?"
First step is check chassis definition files contained in the 1320 gallon mod, because that's 5000 litres of fuel.. give or take.