Hey guys, I have a 94 Mighty Max that I acquired recently and it seems to be going through a quart every 800-1000 miles...meaning I would have to buy 2 jugs of oil for one OCI, which seems ridiculous. I've been running 5w30 HM in it and was considering going thicker, maybe 10w40 or depending on what you guys think, Rotella T. I only drive 10-15 miles each day round trip. Thoughts?