Ryland, I'm the one that messaged you about the Pulstar plugs. About the plugs working in all your cars. It's true, but not because if it fits in the hole it's good. Heat range has to be taken into account. The plug that your cars take is an extremely common plug size and range.
The VX uses a 14mm thread, 19mm reach gasket seat plug with a heat range of NGK 4. The CRX uses a 14mm thread, 19mm reach gasket seat plug with heat range of NGK 4. The Metro uses a 14mm thread, 19mm reach gasket seat plug with heat range of NGK 6. You'll notice that the two Honda engines use the same exact plug and the only difference is the metro that runs two steps colder.
As for the mower and moped. I'm sure the mower uses a 1/2" reach gasket seat that we don't make, unless it's an OHC or OHV mower. The Honda ones use our BE-1(yeah, I laughed too). The moped is probably the same 1/2" reach story or a 12mm thread. Albuquerque Indoor Karting is going to be testing our plugs for use in the OHC Honda karts.
Our BE-1 works in the NGK range of 7-4. The plug is actually a 7 but the increased spark keeps the plug from fouling in situations where other plugs would foul because they're too cold. The GM 3800 is a perfect example. It uses our AD-1 and has a stock heat range of 4, works excellent.
I'm actually eager to get these plugs into the hands of board members here and am looking to get a group discount code for you guys.
I have some test results from cars we've recently done
here. They are more performance oriented overviews but there is a bit of fuel economy data there. Actually, if anyone is in the Albuquerque, NM area we might be able to do a full test on your car.
-Kyle