I live in California and to register my car this year requires a smog check. I'm not really looking for "Marvel's Magic Smog Check Fix" to dump in the tank just before the check but I do want to give it the best chance of passing.
I use the highest octane gas with standard plugs for a '92 SL2 DOHC ( NGK BKR 5E SA-11 ). Would lower octane and longer reach plugs help ?
Any advice is appreciated. I've kept it in good shape; change the oil & filters 2-3 times as often as recommended and drive fairly sanely.
Thanks,
BillM