Review on Magnetic Billet Aluminum Fuel Cap and Blue Cap Combo for Ram Diesel: WHDZ Ram Def Cap Gas Cap by Greg Horn

Like color to distinguish between the two. The downside is that it's not that easy to remove the diesel engine cover as the o-ring makes it too tight on my 17 Ram. I cut my finger badly one night trying to remove the lid to refill. Requires a smaller o-ring to facilitate cap removal. The protective liquid cap isn't too bad. Actually there is no problem with that.