I know i'm repeating myself; Miguel and Don-Ohio, you guys both seem to have Minarellis. The consensus I gather from you both is that I need to drain the 10w-40 "great for 4-stroke engines"(i didn't read the label before i bought it) detergent "motorcycle" oil (recommended by the Suzuki dealer near me) quickly, and add something lighter.I will be running between 50 and 90 degrees F ambient temp. Of course, I have no manual, so just shooting in the dark. Should i start with a synthetic 10w-30, and do these come in non-detergent?, (and i don't understand what's wrong with detergent when that's a selling point with the supplier?). If I ramble further, just shoot me, thanks.