Other cheap but good timing light?

Other cheap but good timing light?,AI智能索引,全网链接索引,智能导航,网页索引

So im getting awful gas mileage, ive already replaced the spark plugs, run fuel injector cleaner, changed the air filter and other minor stuff but right now im pretty sure my supercharged xterra gets better mileage. I read here on the forum that timing can make a big difference but i have no light and a very tight budget. Im not building a racer just a dd so as long as i pull about 30 mpg id be pretty happy. So what kinds of lights to you guys use or suggest? Im also considering replacing