petrol

I have found a Mazda2 TS2 1.3L Petrol 2007 that's done 22,293 miles from a dealer at 4995. Firstly is this a good price? Secondly, is there anything I should look out for before buying it, for example is there any common issues I should be aware of or to look out for? and thirdly if you own a...

The owner's manual calls for gasoline with an octane rating of 87 or higher. The engine (1.5L) has a pretty high static compression ratio of 10:1. I'm wondering if using a higher octane gas would provide a boost in performance/fuel economy, or be better on the engine in general? I know that...