I am trying to find my manual for my Northstar 5500 PPG Pro Series (GX Series Commercial) Generator. Bought it 5 years ago. Running like a champ now (for first time) and just can't find my manual to learn things like - how long it will run with full tank and when do I put in new oil (how many hours before adding more oil. I have tried to find manual on line but cannot. Help me please.

I am just closing this out. Asker has manual.
Kelly

Though without the mannual its really difficult to guess the things but as an expert I will suggest that as far as the engine oil is concerned you should check the level after every ten hours of running if its less than top it up but it should be compleatly replaced after 40 to 60 hours of operation depending upon the conditions you are using the generator if the operating conditions are dusty winds type change it around 40 hours otherwise you can continue up to 60 hours and fuel wise it shoul give you 1.5 to 1.75 liter per hour on rated load if you are on one forth load than it should go five hours on a gallon