Polaris 2003 Frontier - Manual (Page 65)

63
OPERATION
Engine Break-In
Lubrication
Always check the oil level when refueling. Oil must be maintained
between the SAFE and ADD marks on the dipstick. See page 67.
We highly recommend the use of only Polaris products for your
snowmobile. We’re continuously testing lubricants and provide the
highest performance products available for your snowmobile’s engine.
See page 128 for the part numbers of Polaris-recommended products.
Serious engine damage can occur without the proper lubrication.
Check the oil level often during the first tankful of fuel. Maintain
the oil level between the SAFE and ADD marks on the dipstick.
CAUTION
CAUTION
Mixing brands or using a non-recommended oil may cause serious
engine damage. We recommend the use of Polaris Premium 4
Synthetic 0W-40 engine oil for your snowmobile. Never mix brands.