Poured in the oil provided..... Ran it with a 25% load for an hour. Then ran it for a 50% load for an hour. Dumped that stuff...... heavy metallic flake in the oil and it was already, heavily darkened. I poured in some Pennzoil 10w30..... Ran it another hour under a 50% load. Dumped it......
Did something I have never done...... Paid over $10 for a quart of oil. I purchased the Mobil 1 Annual Protection 5w30 and poured in .37 liters. (For the $11 I paid at WallyWorld, I will get two oil changes for the investment.)
I am pleased with this InverterGen.... Really, really pleased with how quiet it is on EcoMode.
Here in Colorado, when we camp at or over 10k feet, we will never run our A/C..... but the wife has a blow dryer and I like to heat up my coffee in the microwave.
By the way.....I had hoped to find some Rotella T5 10w30....but couldn't find it.