I'm going to spend today checking out the air flow meter, o2 sensor, plugs and leads and air filter. I'll have to look up about the fuel filter too. I don't believe it has much to do with the type of octane I'm using. 91 octane wouldn't get me this piss poor mileage. My tires are definitely inflated...

Hey there So I have recently noticed that I'm getting pretty crap mileage out of my 1991 NA. I did a search and found someone using 1990 MX5 for a Tarmac rally used 43.97 litres over 290 km, which is 15.162 L/100km. I am using 45 litres over 350km of normal, open road and town driving . That is 12.8...