Denny wrote:
I will second the commercial oil distributor... Ours is in the next
town, 15 miles away...

Yep, the local Shell distributor (for the DC area it is Quarles
right off I-95 on Telegraph Road (near the big oil tanks) has cases
of all the Shell aviation oils. They'll even lug them out to your
car for you. They also give away country music tapes (seem to cater
to the trucking crowd, it's a promo for Rotella oil).