Things were such a mess downwind of the volcano that very few people were on the road. There was ash inches deep allover everything all the way past Spokane, 300 miles away. Headlights on all day. The acid rain etched the new paint on my 50 Stude and on my 51 Chev pickup which were both parked outside in Seattle. I drove neither till the dust settled. Rode my bicycle to work at the Saab dealer where we did a land office business changing air filters and then engine overhauls. Old Saab 95 and 96 had oil bath air cleaners and seemed to fare better, though maybe it was the Ford industrial V4 engines were better.