hello everyone and anyone,
i left my 87 westy(stella) with my mechanic last night for a head job.  i
left mobil 1 5-30 weight oil with him so that i could begin using synthetic.
my mechanic warned me that he has seen problems with oil pressure and low
viscosity oil in other vans with non-synthetics.
my question is this: am i safe running 5-30 synthetic in stella?

thanks, hugo