The Urban Islands 4-Burner by Bull (Costco) is part of the gas grill
test program at Consumer Reports. In our lab tests, gas grill
models like the 4-Burner by Bull (Costco) are rated on multiple criteria, such as those listed below.
Evaluates the temperature and evenness over the grill's surface after a 10 minute preheat using thermocouples. It also gives an indication how quickly the grill reaches its maximium temperature.
High temp evenness:
Evenness of heating over the grill's surface at the highest setting, using thermocouples.
Low temp evenness:
Evenness of heating over the grill's surface with all main burners set to low, using thermocouples
Features & Specs - Urban Islands 4-Burner by Bull (Costco)
Stainless-steel grates Primary cooking grates made of stainless-steel are generally sturdier than those made of coated steel and resist rust even without a porcelain coating.
Coated-cast-iron grates The grill's primary cooking grates may be made of porcelain coated cast-iron, which generally sears meats better and keeps grilling temperatures more consistent than grates made of porcelain coated steel. The porcelain coating usually makes such grates easier to clean than other surfaces, and the grates should resist rust as long as their porcelain coating isn't chipped.
All or mostly stainless Includes more than just a panel or other trim. Based on our limited tests, nonmagnetic stainless is less likely to corrode.
All or mostly stainless
Long-warranty burners While burners remain the grill's most-replaced part, most are warranted for only 3 to 5 years. Better burners are covered for 10 years or more.
Side burner A side burner, which resembles a gas-stove burner and has its own heat control, is handy if you want to cook vegetables or sauce without leaving the grill. A side burner could also be an infrared burner used for searing.
Infrared burner Gas burner that uses infrared technology (ceramic burner, plates and screens, or troughs as some examples) for cooking. An indirect flame is used for cooking food. Burner can be located as the main burner, side burner, rotisserie burner, or any combination of burners.