When do you know that your engine needs higher-octane fuel? Well, if your engine is stock you can usually go by the manufacturer's recommendations. Your owner's manual should list the specific octane ...

With all the different engine and combustion theories being tested at the Engine Masters Challenge, it made us wonder about the fuel these powerplants were gulping down. For the 2015 event, we had ...

They're everywhere. On the shelves of consumer auto parts stores, on the e-pages of online performance catalogs and occasionally plastered across the flanks of winning competition cars. On their ...

Have pings got you down? Has driving your car become a pain in the gas? Are your exhaust valves being "lead" astray? Well, as promised in last month's "Living With Unleaded," article, have we got some ...