Can You Use 15W-40 Heavy Duty Diesel Oil in a Harley-Davidson Motor?

<p>Official Website:  http://www.lawabidingbiker.com</p> <p >Note: Law Abiding Biker™ Media is not recommending you use any oils in your Harley engine that are not officially approved and/or recommended by Harley-Davidson. We are only relaying information that is known to many in the biker community. You are solely responsible for what you decide to do to your bike.</p> <p >Okay, so you're out on a motorcycle road trip and don't have any synthetic oil or "approved" oil for your Harley-Davidson, but need some suddenly. There are no close stores for motorcycle oil, but the local tru...