I use Purolator #L10017 on my '78 Spitfire 1500. I use this particular
filter simply because when I bought the car that's what was on it, and I've
just replaced it ever since with the same item! I don't have any complaints
about this filter, but I wonder: how would one know whether or not the
filter is working well? Simply by the appearance of the oil that I drain
from the engine during an oil change (the cleaner, the better)?
1978 Spitfire 1500 FM 71614 U
Chicago, IL USA