I am looking to install an oil pressure and oil temp gauge on MY05 WRX but I do not know what ranges to get for the gauges? For the oil temp gauge is 100° F - 250° F range enough or do I go with 140° F - 300° F? Also for the oil pressure 0-100 PSI, 0-150 PSI or 0-200 PSI. Is it better to just get the bigger ranged gauges? If I install this myself, does that void my warranty? I am new at this and any thoughts or suggestions are greatly appreciated and thanks in advance.