According to the Generac website, their air cooled engines are manufactured in Whitewater, Wisconsin, USA.
MTD Powermore engines are made by Zongshen, a Chinese company best known for manufacturing motorcycles and motorcycle engines.
OHV stands for over head valve. It's not a brand name.
fram ph 3614
over-head valve(s)
The 2.2L OHV engines hold 10.3 quarts The 2.3L and 2.4L OHC engines hold 10.7 quarts
Both Cavalier engines, the 2.2 & 2.4 in 2000 are DOHC.
I've been told a Napa #21394 will work I purchased a Generac oil filter in a Generac box at Home Depot labeled "For Use with All Generac OHVI Engines Equipped with Oil Filter Adapter". The box was marked "Model 1323-0", which is apparently the Home Depot model # for the 70185. Inside the box was a NAPA Silver 21394 oil filter.
Honda makes all their own engines.
You could have the 3.0 liter - OHV - Vulcan - V6 , the flex fuel version of the 3.0 liter - OHV - Vulcan - V6 , or the 3.0 liter - DOHC - Duratec - V6 engine
OHV engines run with the camshaft built into the cylinder block, unlike SV engines (no longer used) where they run parallel to the cylinder block. More commonly used in the modern world are OHC (overhead camshaft) engines, which run in a similar manner to OHV engines, eliminate the need for pushrods. The function however? Is the same as any other engine; to spin an axle with high RPM/Torque depending on application.
California has stricter air quality regulations and some engines cannot pass them. As a general rule only OHV engines run clean enough.