What about fuel degrading? Manufacture, storage, shipping, decanting, storage, decanting again, transport, decanting again, storage, and decant again into your LR could take up to 30 days. Diesel has a shelf life of about 90 days before solids start to form. Prior to that the chemistry will change. I like to buy diesel from the stations that have high turnover of fuel. I run a fleet type additive in my fuel very similiar to what Cummins specify for their CR diesels. Don't bother with fuel economy because parasitic loads like air cons and alternators and tools and tyres and rain.... Suprised we have not mentioned viscosity of coolant and hp drain pumping that life blood around....

