Need help deciding on which to buy

614947

{"text":"What's better? A Detroit d15 or a Cummings isx? For saving money and reliability. TIA","pics":"[]","canComment":true}

630524

{"replyTo":"","text":"if i can't get a CAT then it has to be a Cummins","replyToPid":0}

544240

{"replyTo":"","text":"I like Cummins better, but the bottom line is more money in your pocket so, the Detroit for the fuel economy ","replyToPid":0}

289718

{"replyTo":"","text":"I have a Cummins and I had it deleted and was done right and did not have it turned up. I have almost 900k on it and besides tune ups here and there only thing I have had done major was a head gasket","replyToPid":0}