Went to the Wallyworld today to get the oil changed in the Trooper(don't smack me please). Had intended to go with the Syntec 10w-40 (oil consumption issues, at least to me) since they say they cannot get 5w-40 Mobil 1. Had them put on a SuperTech filter instead of the OrangeDeathCan. Well I wanted to watch them change the oil (imagine that!!). The service man had to ask again what oil to use (a scary thought) so I took a chance and told them to use 4qts Mobil 1 10w-30 and 1 qt Mobil 1 15w-50. Now what roughly would the operating viscosity be at say 100c? I know a few on here have used a similar mixture, what were your results? My goal was to get to a thick 30wt or a thin 40wt. Would it be better to use 2 qts 15w-50 to 3 10w-30? Are there any VOA's on these two oils? I am having no luck searching for any. Thanks!!