Algebra - Cost of car

Mr Corney travels 16 km from home to school. Assume he commutes to school and back five times each week. Which of his two cars will be the cheapest to run?

Presley: 

1996 Nissan Presea (1.6 l Petrol) [9L per 100km] (carjam.com)

Petrol: $2.15/l

Gus: 

Toyota Prado 2002 (3L diesel) [12.6 L per 100km] Source EECA energywise

Diesel: $1.50 L

Road user charges: $53 per 1000km (source NZTA)