Where is the oil filter located on 2012 RZR 800

If the crankshaft is locked up,,, time for MAJOR repair... take this to a PROFESSIONAL Mechanic
This will (probably) NOT be a quick fix!!!!

Any synthetic oil of the same viscosity will work!

are you using the correct key --possible need tune up --check fuel filter air filter plug and wires and possible carb / rebuild

hard to shift gears - Polaris ATV Forum

www.polarisatvforums.com > ... > Polaris Sportsman

Jun 28, 2010 - my 06 500 efi creeps and sometime is a little hard to shift. the dealer told me ... inline. if its off a little when you are stopped and trying to shift the tranny has... 2013 RZR XP 900 .... shop, for first service and to put in a new belt, blew up the firstone already. ... what makes a polaris crew hard to change gears.

Won't shift with motor running. Need help please - Polaris RZR ...

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Mar 6, 2012 - It will not shift in any gear with the motor running, but if I turn it off I can.... First Name: Jeanie ... 2013 Grizzly ... LE - Muzzy, UMP, Donaldson, TS Seats, FixMyToys parts.. and a lot of hard work .... 2005 polaris sportsman 500 shifter problems stuck in reverse ... polaris ranger 700 crew wont shift when running. How to adjust shifter
Nov 27, 2013
Issue: In gear, but will not drive
Oct 22, 2012
Gear Grinding
Oct 7, 2012
HELP trans is hard to shift
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Ranger Problems & Solutions [Archive] - PRC Polaris

Front prop shaft..
up front near the diff, there is a roll pin that goes through the input shaft to the front diff.. drive that out, then unbolt the four bolts on the bottom of the diff so you can move it forward.
work it forward and get the u-joint off of the diff's input shaft.. when you get that free and out of the way, gently tap on the rear of the shaft to work it off of the transfer case's output shaft.
hows that.. :)

That's sounds strange?
Oil can only leak out or the engine is burning it.?
If its burning your oil valve stem seals are worn it lets oil into your combustion chamber and burn it.
Maybe get a local mechanic to take a look.
Good luck

water in gas maybe?

A typical, fully charged & unloaded 12 volt lead acid battery should indicate about 12.6 V. Check the voltage / percent charge chart below:

Volts - Charge
11.7 - 10%
11.9 - 20%
12.1 - 30%
12.25 - 40%
12.35 - 50%
12.45 - 60%
12.5 - 70%
12.6 - 100

A fully charged that is only about 12V indicates a a problem with the battery - dead / shorted cells, etc. You can always remove the battery and have it tested at Autozone or similar auto parts stores if you're unsure. From the info you've provided - my guess is that the battery is "done"

I hope this was helpful - good luck!

Common problem,if you have power going to the fan,you need to have the fan removed,the brushes cleaned,lightly oiled and tested.

If you're burning oil, you likely have either bad rings or valve stem seals. Either way, you will probably need an automotive machine shop...unless you've done this sort of repair before. In that case, good luck.