Dumfounded sound more like they were just dumb, I would find a different shop if they are not smart enough to know you can't screw a 3/4 16" thread oil filter to a GM's M18 x 1.5 thread and think it will still work even though the filter is the same physical size. Yeah it will screw on but heck no it will not seal.
That's why I always bring my own stuff when doing anything, don't relay that all mechanics or properly trained or even know what they are doing. Something like that should never happen with common sense. I mean come really
* sirkosero
The Baldwin BT223 is the best option for filters for Toyotas, it's 98% efficient * 12 microns vs Toyota's OEM's 88% * 40 microns they are horrible filters. They are almost identical to VIC in filtering ability and their dirt holding capacity is also pretty weak.