It could depend on what type of climate or seasonal-change area you live in. Overall a lubricating oil weight of 5W-30 is probably best all around.
The curb weight of the 2003 Honda Accord is 2989 lbs..
The curb weight of the 2003 Honda Odyssey is 4310 lbs..
The curb weight of the 2003 Honda Civic is 2403 lbs..
The curb weight of the 2003 Honda Pilot is 4416 lbs..
The curb weight of the 2003 Honda Insight is 1847 lbs..
The gross weight of the 2003 Honda Accord is 4080 lbs..
The curb weight of the 2003 Honda CR-V is 3201 lbs..
A 2003 Honda Civic'c cost will depend largely on the amount of miles on the Honda Civic. The more miles on the civic, the cheaper the Honda Civic will be.
On average, a 2003 Honda Pilot's curb weight is 2,003kg and gross trailer weight braked; 2,041kg.
Avg 32gals...
Honda recommends changing it at 100,000 miles. I personally recommend you change it every 75,000 miles. The 2003 Honda Accord had problems with the transmission so I would recommend this as a preventative measure.
The EPA range estimate for the 2003 Honda Insight is 508.8 mi. in the city, 625.4 mi. on the highway.