No, they do not interchange.
Idon't know about a 1995 Polaris 300 Sportsman, but I have a 2008 Polaris 300 Sportsman and the main particular oil I use for mine is Polaris brand oil. If your not satisfied with my answer, call your Polaris Company.
Only use Polaris oil or amsoil in any polaris.
you would use polaris specified AGL fluid in the transmission
Yes, as long as you use the correct SAE weight oil. Polaris oil is regular oil.
0W-40. I use the AMZOIL blend in mine.
Polaris four stroke oil is a 0-40w synthetic.
SAE 10w30 synthetic is a great choice.
2 stroke-NOT outboard, but the same type such as used in chainsaws
0W-40. I use the AMZOIL ATV blend in mine.
buy the owners manual, the sportsman 600 & 700 should use rc7yc and they should be gaped at .035" (.90 mm)
0W-40. I use the AMZOIL blend made for ATV's in mine.
You can use regular anti-freez 50/50 mix with distilled water.