I'm just curious.  We are traveling cross country in our 2018 storm 34s,  and was curious as to what type motor oil it uses,  so I can top it off??? Also,  where or how do you fill or add the engine oil to this motorhome? We bought it used and it came with very few manuals.  To be honest,  so far,  there have been many issues and we are not too impressed at this juncture. 

Thanks, 

Mike