quote:How did that Castrol Start-up do in your truck? Just curious because I felt it was a marketing gimmick from jump..
Originally posted by JHZR2: I log and calculate every tank. In my truck, I switched from Castrol start-up 5w-30 to GC 0w-30. The mileage has been consistent and the same. JMH
quote:Patman,every morning on the way in to work someone passes me like a complete maniac,racing from light to light in mulberry Civic.He's either slamming the gas or the brakes LOL. One day i'm gonna blow the doors off of him .
Originally posted by Patman: I noticed no change in mileage in my wife's Civic when I went from Mobil 1 Trisynthetic to Royal Purple 5w30 to GC 0w30. All three oils showed identical MPG numbers. She only gets about 23 MPG (city driving, combined with her lead foot)