Always use synthetic.
10W30
unleaded
The 2004 Acura NSX runs on regular unleaded.
The 2004 GMC Canyon runs on regular unleaded.
The 2004 Chevrolet Express runs on regular unleaded.
The 2004 Chevrolet Impala runs on regular unleaded.
The 2004 Mazda MAZDA6 runs on regular unleaded.
The 2004 Jeep Wrangler runs on regular unleaded.
The 2004 Mitsubishi Lancer runs on regular unleaded.
The 2004 Hyundai Sonata runs on regular unleaded.
The 2004 Chevrolet Colorado runs on regular unleaded.
The 2004 Kia Rio runs on regular unleaded.