Hi all-would like to poll the collective opinion on which oil to use in my Dodge 318. It is in a 1997 2500 Ram Van which has a motorhome conversion by Roadtrek. It currently has 133K miles and in the last 1500 miles, has not used any oil. I am leaning towards Maxlife 10/30 synthetic blend. What say you about this choice? Are there others I should consider? Thanks.