I recently just put in gtx start up with a quart of lucas. with both added I filled it up about 4 3/4's quarts of oil. Wanted to know if this is a bad idea because someone told me that start up and lucas are basically the same thing.. I have 106 miles on my car, Just did an oil change about 100 miles ago. I can still use the same filter, it's still new. Thinking about changing my oil again and just using what I been using that new better GTX high mileage.