of course you can! it works even better if i say so myself
10w40
1.5Liter
10w30
1.7 q.
About 2 quarts
The oil capacity for a 2005 Honda Recon 250 is 1.6 quarts or 51.2 ounces. The recommended oil is an SG or higher API rating in a 10-40 weight.
regular
Two quarts.
2.7 US ozs.
Honda recommends SAE 10W40 in a GN4 or HP4 classification for 4 stroke applications.
One can use regular automobile motor oil in a Honda recon. however, it is recommended that one use regular ATV 30 weight oil in these machines. The oil capacity for this particular model is 1.7 quarts.
It is located in the bottom of the engine, accessible through holes in the underbody panel.