I want to use the GC I have waiting for my dakota. but dont want to waste the M-1 I have in it now. the elves are now speaking to me saying drain it. drain it now. you know you want too. I thought if I put a quart in my push mower (by the way it ran great. I love it) I thought I could quiet them down. but no they still speaking to me. what to do . also want to do a UOA on the M-1 but need more niles on it. think I am at 2,000 at the most right now. changed it back in sept. what should I do. go ahead and drain the oil and put the GC in and make the elvish gods happy or wait till I get to 36,000 (400 miles away).then change it as thats my target. I do mostly local driving to and from work thats 3 miles round trip. then change it as thats my target and will be 3,000 miles. the oil has started to change color on the dip stick.